diff --git a/layouts/gallery/single.html b/layouts/gallery/single.html
index 39d63d4..68ae2af 100644
--- a/layouts/gallery/single.html
+++ b/layouts/gallery/single.html
@@ -20,73 +20,75 @@
 {{ partial "body/photoswipe" . }}
 
 {{ $masonry := resources.Get `js/masonry.pkgd.min.js` | resources.Fingerprint }}
-<script src="{{ $masonry.RelPermalink }}"></script>
+<script defer src="{{ $masonry.RelPermalink }}"></script>
 {{ $imagesloaded := resources.Get `js/imagesloaded.pkgd.min.js` | resources.Fingerprint }}
-<script src="{{ $imagesloaded.RelPermalink }}"></script>
+<script defer src="{{ $imagesloaded.RelPermalink }}"></script>
 
 <script>
-  var $grid = $('.grid').masonry({
-    itemSelector: '.grid-item',
-    columnWidth: '.grid-sizer',
-    percentPosition: true,
-  });
-  $grid.imagesLoaded().progress(function () {
-    $grid.masonry();
-  });
+  $(document).ready(function () {
+    var $grid = $('.grid').masonry({
+      itemSelector: '.grid-item',
+      columnWidth: '.grid-sizer',
+      percentPosition: true,
+    });
+    $grid.imagesLoaded().progress(function () {
+      $grid.masonry();
+    });
 
-  enquire.register("screen and (max-width:500px)", {
-    match: function () {
-      $('.grid-item').addClass('full');
-      $('.grid-sizer').addClass('full');
-      $('.grid-item').removeClass('half');
-      $('.grid-sizer').removeClass('half');
-    },
-    unmatch: function () {
-      $('.grid-item').addClass('half');
-      $('.grid-sizer').addClass('half');
-      $('.grid-item').removeClass('full');
-      $('.grid-sizer').removeClass('full');
-    },
-  }).register("screen and (max-width:700px)", {
-    match: function () {
-      $('.grid-item').addClass('half');
-      $('.grid-sizer').addClass('half');
-      $('.grid-item').removeClass('third');
-      $('.grid-sizer').removeClass('third');
-    },
-    unmatch: function () {
-      $('.grid-item').addClass('third');
-      $('.grid-sizer').addClass('third');
-      $('.grid-item').removeClass('half');
-      $('.grid-sizer').removeClass('half');
-    },
-  }).register("screen and (max-width:900px)", {
-    match: function () {
-      $('.grid-item').addClass('third');
-      $('.grid-sizer').addClass('third');
-      $('.grid-item').removeClass('quarter');
-      $('.grid-sizer').removeClass('quarter');
-    },
-    unmatch: function () {
-      $('.grid-item').addClass('quarter');
-      $('.grid-sizer').addClass('quarter');
-      $('.grid-item').removeClass('third');
-      $('.grid-sizer').removeClass('third');
-    },
-  }).register("screen and (max-width:1200px)", {
-    match: function () {
-      $('.grid-item').addClass('quarter');
-      $('.grid-sizer').addClass('quarter');
-      $('.grid-item').removeClass('fifth');
-      $('.grid-sizer').removeClass('fifth');
-    },
-    unmatch: function () {
-      $('.grid-item').addClass('fifth');
-      $('.grid-sizer').addClass('fifth');
-      $('.grid-item').removeClass('quarter');
-      $('.grid-sizer').removeClass('quarter');
-    },
-  });   
+    enquire.register("screen and (max-width:500px)", {
+      match: function () {
+        $('.grid-item').addClass('full');
+        $('.grid-sizer').addClass('full');
+        $('.grid-item').removeClass('half');
+        $('.grid-sizer').removeClass('half');
+      },
+      unmatch: function () {
+        $('.grid-item').addClass('half');
+        $('.grid-sizer').addClass('half');
+        $('.grid-item').removeClass('full');
+        $('.grid-sizer').removeClass('full');
+      },
+    }).register("screen and (max-width:700px)", {
+      match: function () {
+        $('.grid-item').addClass('half');
+        $('.grid-sizer').addClass('half');
+        $('.grid-item').removeClass('third');
+        $('.grid-sizer').removeClass('third');
+      },
+      unmatch: function () {
+        $('.grid-item').addClass('third');
+        $('.grid-sizer').addClass('third');
+        $('.grid-item').removeClass('half');
+        $('.grid-sizer').removeClass('half');
+      },
+    }).register("screen and (max-width:900px)", {
+      match: function () {
+        $('.grid-item').addClass('third');
+        $('.grid-sizer').addClass('third');
+        $('.grid-item').removeClass('quarter');
+        $('.grid-sizer').removeClass('quarter');
+      },
+      unmatch: function () {
+        $('.grid-item').addClass('quarter');
+        $('.grid-sizer').addClass('quarter');
+        $('.grid-item').removeClass('third');
+        $('.grid-sizer').removeClass('third');
+      },
+    }).register("screen and (max-width:1200px)", {
+      match: function () {
+        $('.grid-item').addClass('quarter');
+        $('.grid-sizer').addClass('quarter');
+        $('.grid-item').removeClass('fifth');
+        $('.grid-sizer').removeClass('fifth');
+      },
+      unmatch: function () {
+        $('.grid-item').addClass('fifth');
+        $('.grid-sizer').addClass('fifth');
+        $('.grid-item').removeClass('quarter');
+        $('.grid-sizer').removeClass('quarter');
+      },
+    });
+  }     
 </script>
 
 {{ end }}
\ No newline at end of file
diff --git a/layouts/partials/body/perfectscrollbar.html b/layouts/partials/body/perfectscrollbar.html
index bae197d..5a97435 100644
--- a/layouts/partials/body/perfectscrollbar.html
+++ b/layouts/partials/body/perfectscrollbar.html
@@ -1,12 +1,14 @@
 {{ if $.Param "enableCustomScrollbar" }}
 
 {{ $customscrollbar := resources.Get `js/perfect-scrollbar.jquery.min.js` | resources.Fingerprint }}
-<script src="{{ $customscrollbar.RelPermalink }}"></script>
+<script defer src="{{ $customscrollbar.RelPermalink }}"></script>
 {{ $customScrollbarStyle := resources.Get "css/perfect-scrollbar.min.css" }}
-<script src="{{ $customScrollbarStyle.RelPermalink }}"></script>
+<script defer src="{{ $customScrollbarStyle.RelPermalink }}"></script>
 
-<script>  
-  var pre = $('pre');
-  pre.perfectScrollbar(); 
+<script>
+  $(document).ready(function () {
+    var pre = $('pre');
+    pre.perfectScrollbar(); 
+  }    
 </script>
 {{ end }}
\ No newline at end of file
diff --git a/layouts/partials/head/scripts.html b/layouts/partials/head/scripts.html
index 102b948..745204d 100644
--- a/layouts/partials/head/scripts.html
+++ b/layouts/partials/head/scripts.html
@@ -1,7 +1,7 @@
 {{ $jquery := resources.Get "js/jquery.min.js" | resources.Fingerprint }}
-<script src="{{ $jquery.RelPermalink }}"></script>
+<script async src="{{ $jquery.RelPermalink }}"></script>
 {{ $clipboard := resources.Get "js/clipboard.min.js" | resources.Fingerprint }}
-<script src="{{ $clipboard.RelPermalink }}"></script>
+<script defer src="{{ $clipboard.RelPermalink }}"></script>
 {{ $enquire := resources.Get "js/enquire.min.js" | resources.Fingerprint }}
 <script defer src="{{ $enquire.RelPermalink }}"></script>
 {{ $prism := resources.Get "js/prism.min.js" | minify | resources.Fingerprint }}
diff --git a/layouts/partials/sidebar/sidebar-single.html b/layouts/partials/sidebar/sidebar-single.html
index c33556e..28c2e09 100644
--- a/layouts/partials/sidebar/sidebar-single.html
+++ b/layouts/partials/sidebar/sidebar-single.html
@@ -8,101 +8,103 @@
 </div>
 
 {{ $toc := resources.Get `js/jquery.toc.min.js` | resources.Fingerprint }}
-<script src="{{ $toc.RelPermalink }}"></script>
+<script defer src="{{ $toc.RelPermalink }}"></script>
 
 <script>
-  var navbar = $('.navbar');
+  $(document).ready(function () {
+    var navbar = $('.navbar');
 
-  $("#toc").toc({ content: ".single__contents", headings: "h1,h2,h3,h4" });
-  $('#toc > li').each(function () {
-    $(this).find('ul').css('display', 'none');
-  });
-  $('#toc a').each(function () {
-    $(this).click(function () {
-      navbar.removeClass('navbar--show');
-      navbar.removeClass('navbar--hide');
-      navbar.addClass('navbar--hide');
-
-      $(".single__contents :header").each(function () {
-        $('.toc a').removeClass('active');
-      });
-      $(this).addClass('active');
-
-      $('#toc > li').each(function () {
-        $(this).find('ul').css('display', 'none');
-      });
-      $(this).next().css('display', 'block');
-      $(this).parents('ul').css('display', 'block');
+    $("#toc").toc({ content: ".single__contents", headings: "h1,h2,h3,h4" });
+    $('#toc > li').each(function () {
+      $(this).find('ul').css('display', 'none');
     });
-  });
+    $('#toc a').each(function () {
+      $(this).click(function () {
+        navbar.removeClass('navbar--show');
+        navbar.removeClass('navbar--hide');
+        navbar.addClass('navbar--hide');
 
-  // Add link button for every
-  var text, clip = new ClipboardJS('.anchor');
-  var headers = $('.single__contents :header').not('h6').not('h5');
-  headers.append(function (index, html) {
-    var element = $(this);
-    var url = encodeURI(document.location.origin + document.location.pathname);
-    var link = url + "#" + element[0].id;
-    return " <span class='anchor hide' data-clipboard-text='" + link + "' style='position: relative;'>" +
-      "<span style='font-size: 1rem; position: absolute; right: -2rem; top: 50%; transform: translateY(-50%)'>🔗</span>" +
-      "</span>"
-      ;
-  });
-  headers.on('mouseenter', function () {
-    $(this).find('.anchor').attr('class', 'anchor');
-  });
-  headers.on('mouseleave', function () {
-    $(this).find('.anchor').attr('class', 'anchor hide');
-  });
-
-  $(".anchor").on('mouseleave', function (e) {
-    $(this).attr('aria-label', null).removeClass('tooltipped tooltipped-s tooltipped-w');
-  });
-
-  clip.on('success', function (e) {
-    e.clearSelection();
-    $(e.trigger).attr('aria-label', 'Link copied to clipboard!').addClass('tooltipped tooltipped-s');
-  });
-
-  // clipboard
-  var clipInit = false;
-  $('code').each(function () {
-    var code = $(this),
-      text = code.text();
-
-    if (text.length > 30) {
-      if (!clipInit) {
-        var text, clip = new ClipboardJS('.copy-to-clipboard', {
-          text: function (trigger) {
-            text = $(trigger).prev('code').text();
-            return text.replace(/^\$\s/gm, '');
-          }
+        $(".single__contents :header").each(function () {
+          $('.toc a').removeClass('active');
         });
+        $(this).addClass('active');
 
-        var inPre;
-        clip.on('success', function (e) {
-          e.clearSelection();
-          inPre = $(e.trigger).parent().prop('tagName') == 'PRE';
-          $(e.trigger).attr('aria-label', 'Copied to clipboard!').addClass('tooltipped tooltipped-' + (inPre ? 'w' : 's'));
+        $('#toc > li').each(function () {
+          $(this).find('ul').css('display', 'none');
         });
+        $(this).next().css('display', 'block');
+        $(this).parents('ul').css('display', 'block');
+      });
+    });
 
-        clip.on('error', function (e) {
-          inPre = $(e.trigger).parent().prop('tagName') == 'PRE';
-          $(e.trigger).attr('aria-label', fallbackMessage(e.action)).addClass('tooltipped tooltipped-' + (inPre ? 'w' : 's'));
-          $(document).one('copy', function () {
+    // Add link button for every
+    var text, clip = new ClipboardJS('.anchor');
+    var headers = $('.single__contents :header').not('h6').not('h5');
+    headers.append(function (index, html) {
+      var element = $(this);
+      var url = encodeURI(document.location.origin + document.location.pathname);
+      var link = url + "#" + element[0].id;
+      return " <span class='anchor hide' data-clipboard-text='" + link + "' style='position: relative;'>" +
+        "<span style='font-size: 1rem; position: absolute; right: -2rem; top: 50%; transform: translateY(-50%)'>🔗</span>" +
+        "</span>"
+        ;
+    });
+    headers.on('mouseenter', function () {
+      $(this).find('.anchor').attr('class', 'anchor');
+    });
+    headers.on('mouseleave', function () {
+      $(this).find('.anchor').attr('class', 'anchor hide');
+    });
+
+    $(".anchor").on('mouseleave', function (e) {
+      $(this).attr('aria-label', null).removeClass('tooltipped tooltipped-s tooltipped-w');
+    });
+
+    clip.on('success', function (e) {
+      e.clearSelection();
+      $(e.trigger).attr('aria-label', 'Link copied to clipboard!').addClass('tooltipped tooltipped-s');
+    });
+
+    // clipboard
+    var clipInit = false;
+    $('code').each(function () {
+      var code = $(this),
+        text = code.text();
+
+      if (text.length > 30) {
+        if (!clipInit) {
+          var text, clip = new ClipboardJS('.copy-to-clipboard', {
+            text: function (trigger) {
+              text = $(trigger).prev('code').text();
+              return text.replace(/^\$\s/gm, '');
+            }
+          });
+
+          var inPre;
+          clip.on('success', function (e) {
+            e.clearSelection();
+            inPre = $(e.trigger).parent().prop('tagName') == 'PRE';
             $(e.trigger).attr('aria-label', 'Copied to clipboard!').addClass('tooltipped tooltipped-' + (inPre ? 'w' : 's'));
           });
+
+          clip.on('error', function (e) {
+            inPre = $(e.trigger).parent().prop('tagName') == 'PRE';
+            $(e.trigger).attr('aria-label', fallbackMessage(e.action)).addClass('tooltipped tooltipped-' + (inPre ? 'w' : 's'));
+            $(document).one('copy', function () {
+              $(e.trigger).attr('aria-label', 'Copied to clipboard!').addClass('tooltipped tooltipped-' + (inPre ? 'w' : 's'));
+            });
+          });
+
+          clipInit = true;
+        }
+
+        code.after('<span class="copy-to-clipboard" title="Copy to clipboard" />');
+        code.next('.copy-to-clipboard').on('mouseleave', function () {
+          $(this).attr('aria-label', null).removeClass('tooltipped tooltipped-s tooltipped-w');
         });
-
-        clipInit = true;
       }
-
-      code.after('<span class="copy-to-clipboard" title="Copy to clipboard" />');
-      code.next('.copy-to-clipboard').on('mouseleave', function () {
-        $(this).attr('aria-label', null).removeClass('tooltipped tooltipped-s tooltipped-w');
-      });
-    }
-  });  
+    });
+  }    
 </script>
 
 {{ end }}
\ No newline at end of file
diff --git a/layouts/partials/sidebar/site-mark.html b/layouts/partials/sidebar/site-mark.html
index a4df077..7156100 100644
--- a/layouts/partials/sidebar/site-mark.html
+++ b/layouts/partials/sidebar/site-mark.html
@@ -1,38 +1,40 @@
 {{ if $.Param "enableMark" }}
 {{ $mark := resources.Get "js/jquery.mark.min.js" | resources.Fingerprint }}
-<script src="{{ $mark.RelPermalink }}"></script>
+<script defer src="{{ $mark.RelPermalink }}"></script>
 
 <script>
-  var mark = function () {
-    var keyword = $("#search").val();
-    var options = {
-      "element": "mark",
-      "className": "",
-      "exclude": [],
-      "iframes": false,
-      "iframesTimeout": 5000,
-      "acrossElements": false,
-      "ignoreGroups": 0,
-      "each": function (node) {
-      },
-      "filter": function (textNode, foundTerm, totalCounter) {
-        return true;
-      },
-      "noMatch": function (term) {
-      },
-      "done": function (counter) {
-      },
-      "debug": false,
-      "log": window.console
+  $(document).ready(function () {
+    var mark = function () {
+      var keyword = $("#search").val();
+      var options = {
+        "element": "mark",
+        "className": "",
+        "exclude": [],
+        "iframes": false,
+        "iframesTimeout": 5000,
+        "acrossElements": false,
+        "ignoreGroups": 0,
+        "each": function (node) {
+        },
+        "filter": function (textNode, foundTerm, totalCounter) {
+          return true;
+        },
+        "noMatch": function (term) {
+        },
+        "done": function (counter) {
+        },
+        "debug": false,
+        "log": window.console
+      };
+
+      $(".container").unmark({
+        done: function () {
+          $(".container").mark(keyword, options);
+        }
+      });
     };
 
-    $(".container").unmark({
-      done: function () {
-        $(".container").mark(keyword, options);
-      }
-    });
-  };
-
-  $("#search").on("input", mark);
+    $("#search").on("input", mark);
+  }  
 </script>
 {{ end }}
\ No newline at end of file
diff --git a/layouts/partials/sidebar/site-search.html b/layouts/partials/sidebar/site-search.html
index adc1097..07b4711 100644
--- a/layouts/partials/sidebar/site-search.html
+++ b/layouts/partials/sidebar/site-search.html
@@ -13,7 +13,7 @@
 
 {{ partial "sidebar/site-mark" . }}
 {{ $lunr := resources.Get "js/lunr.min.js" | resources.Fingerprint }}
-<script src="{{ $lunr.RelPermalink }}"></script>
+<script defer src="{{ $lunr.RelPermalink }}"></script>
 
 <script>
   {{ if .Site.IsMultiLingual }}
@@ -22,125 +22,126 @@
       var baseurl = "{{.Site.BaseURL}}";
   {{ end }}
   
-  
-  var lunrIndex = null;
-  var pagesIndex = null;
-  var searchResults = null;
-  var searchMenu = null;
+  $(document).ready(function () {
+    var lunrIndex = null;
+    var pagesIndex = null;
+    var searchResults = null;
+    var searchMenu = null;
 
-  function endsWith(str, suffix) {
-    return str.indexOf(suffix, str.length - suffix.length) !== -1;
-  }
+    function endsWith(str, suffix) {
+      return str.indexOf(suffix, str.length - suffix.length) !== -1;
+    }
 
-  function initLunr() {
-    if (!endsWith(baseurl, "/")) {
-      baseurl = baseurl + '/';
-    };
+    function initLunr() {
+      if (!endsWith(baseurl, "/")) {
+        baseurl = baseurl + '/';
+      };
 
-    $.getJSON(baseurl + "index.json")
-      .done(function (index) {
-        pagesIndex = index;
-        lunrIndex = lunr(function () {
-          this.ref('uri');
-          this.field('title');
-          this.field('description');
-          //this.field('content');
-          //this.field('tags');
-          //this.field('series');
-          //this.field('categories');
+      $.getJSON(baseurl + "index.json")
+        .done(function (index) {
+          pagesIndex = index;
+          lunrIndex = lunr(function () {
+            this.ref('uri');
+            this.field('title');
+            this.field('description');
+            //this.field('content');
+            //this.field('tags');
+            //this.field('series');
+            //this.field('categories');
 
-          var that = this;
-          index.forEach(function (page) {
-            that.add(page);
+            var that = this;
+            index.forEach(function (page) {
+              that.add(page);
+            });
           });
+        })
+        .fail(function (jqxhr, textStatus, error) {
+          var err = textStatus + ", " + error;
+          console.error("Error getting Hugo index file:", err);
         });
-      })
-      .fail(function (jqxhr, textStatus, error) {
-        var err = textStatus + ", " + error;
-        console.error("Error getting Hugo index file:", err);
-      });
-  }
+    }
 
-  function search(query) {
-    return lunrIndex.search(query).map(function (result) {
-      return pagesIndex.filter(function (page) {
-        return page.uri === result.ref;
-      })[0];
+    function search(query) {
+      return lunrIndex.search(query).map(function (result) {
+        return pagesIndex.filter(function (page) {
+          return page.uri === result.ref;
+        })[0];
+      });
+    }
+
+    function renderSearchResults(results) {
+      searchResults = document.getElementById('search-results');
+      searchMenu = document.getElementById('search-menu');
+      searchResults.setAttribute('class', 'dropdown is-active');
+
+      var content = document.createElement('div');
+      content.setAttribute('class', 'dropdown-content search-content');
+
+      if (results.length > 0) {
+        results.forEach(function (result) {
+          var item = document.createElement('a');
+          item.setAttribute('href', result.uri);
+          item.setAttribute('class', 'dropdown-item');
+          item.innerHTML = `<div class="menu-item"><div class="menu-item__title">» ${result.title}</div><div class="menu-item__desc">${result.description ? result.description : result.content}</div></div>`;
+          content.appendChild(item);
+        });
+      } else {
+        var item = document.createElement('span');
+        item.setAttribute('class', 'dropdown-item');
+        item.innerText = 'No results found';
+        content.appendChild(item);
+      }
+
+      while (searchMenu.hasChildNodes()) {
+        searchMenu.removeChild(
+          searchMenu.lastChild
+        );
+      }
+      searchMenu.appendChild(content);
+    }
+
+    initLunr();
+
+    $("#search").on('input', function (e) {
+      if (!e.target.value) {
+        $('#search-results').attr('class', 'dropdown');
+        return null;
+      }
+      var results = search(e.target.value);
+      renderSearchResults(results);
+    });
+
+    $('#search').on('blur', function () {
+      setTimeout(function () {
+        $('#search-results').attr('class', 'dropdown');
+      }, 100);
+    });
+
+    $('#search').on('click', function (e) {
+      if (!e.target.value) {
+        $('#search-results').attr('class', 'dropdown');
+        return null;
+      }
+      var results = search(e.target.value);
+      renderSearchResults(results);
+    });
+
+    $('#search').on('keydown', function (e) {
+      var items = $('#search-menu .dropdown-item');
+      var activeIndex = $('#search-menu .dropdown-item.is-active').index();
+
+      items.removeClass('is-active');
+      if (e.key === 'ArrowDown') {
+        items.eq(activeIndex + 1).addClass('is-active');
+      } else if (e.key === 'ArrowUp') {
+        items.eq(activeIndex - 1).addClass('is-active');
+      } else if (e.key === 'Enter') {
+        var currentItemLink = items.eq(activeIndex).attr('href');
+        if (currentItemLink) {
+          location.href = currentItemLink;
+        }
+      }
     });
   }
-
-  function renderSearchResults(results) {
-    searchResults = document.getElementById('search-results');
-    searchMenu = document.getElementById('search-menu');
-    searchResults.setAttribute('class', 'dropdown is-active');
-
-    var content = document.createElement('div');
-    content.setAttribute('class', 'dropdown-content search-content');
-
-    if (results.length > 0) {
-      results.forEach(function (result) {
-        var item = document.createElement('a');
-        item.setAttribute('href', result.uri);
-        item.setAttribute('class', 'dropdown-item');
-        item.innerHTML = `<div class="menu-item"><div class="menu-item__title">» ${result.title}</div><div class="menu-item__desc">${result.description ? result.description : result.content}</div></div>`;
-        content.appendChild(item);
-      });
-    } else {
-      var item = document.createElement('span');
-      item.setAttribute('class', 'dropdown-item');
-      item.innerText = 'No results found';
-      content.appendChild(item);
-    }
-
-    while (searchMenu.hasChildNodes()) {
-      searchMenu.removeChild(
-        searchMenu.lastChild
-      );
-    }
-    searchMenu.appendChild(content);
-  }
-
-  initLunr();
-
-  $("#search").on('input', function (e) {
-    if (!e.target.value) {
-      $('#search-results').attr('class', 'dropdown');
-      return null;
-    }
-    var results = search(e.target.value);
-    renderSearchResults(results);
-  });
-
-  $('#search').on('blur', function () {
-    setTimeout(function () {
-      $('#search-results').attr('class', 'dropdown');
-    }, 100);
-  });
-
-  $('#search').on('click', function (e) {
-    if (!e.target.value) {
-      $('#search-results').attr('class', 'dropdown');
-      return null;
-    }
-    var results = search(e.target.value);
-    renderSearchResults(results);
-  });
-
-  $('#search').on('keydown', function (e) {
-    var items = $('#search-menu .dropdown-item');
-    var activeIndex = $('#search-menu .dropdown-item.is-active').index();
-
-    items.removeClass('is-active');
-    if (e.key === 'ArrowDown') {
-      items.eq(activeIndex + 1).addClass('is-active');
-    } else if (e.key === 'ArrowUp') {
-      items.eq(activeIndex - 1).addClass('is-active');
-    } else if (e.key === 'Enter') {
-      var currentItemLink = items.eq(activeIndex).attr('href');
-      if (currentItemLink) {
-        location.href = currentItemLink;
-      }
-    }
-  });
 </script>
 {{ end }}
\ No newline at end of file