style bug fixed

assets/sass/abstracts/_mixins.scss

@@ -101,6 +101,13 @@
 }
 
 @mixin truncate($truncation-boundary) {
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  max-width: $truncation-boundary;
+}
+
+@mixin truncate2($truncation-boundary) {
   white-space: nowrap;
   overflow: hidden;
   text-overflow: ellipsis;

assets/sass/pages/_talk.scss

@@ -50,7 +50,7 @@
   }
 
   &__title {
-    @include truncate($grid-max-width);
+    @include truncate2($grid-max-width);
 
     &--margin {
       margin-right: 0.5rem;  
@@ -68,10 +68,10 @@
 
       @include flexbox();
       @include align-items(center);
-      @include truncate(650px);
+      @include truncate2(650px);
       @media only screen and (max-width: 769px) {
         margin-left: -6.8rem;
-        @include truncate(350px);
+        @include truncate2(350px);
       }
     }