Fix #744

sass/elements/title.sass

@@ -31,7 +31,7 @@ $subtitle-weight:   $weight-light !default
     margin-top: -0.75rem
   &:not(.is-spaced) + .subtitle
     margin-top: -1.5rem
-  // Colors
+  // Sizes
   @each $size in $sizes
     $i: index($sizes, $size)
     &.is-#{$i}
@@ -46,7 +46,7 @@ $subtitle-weight:   $weight-light !default
     color: $subtitle-strong
   &:not(.is-spaced) + .title
     margin-top: -1.5rem
-  // Colors
+  // Sizes
   @each $size in $sizes
     $i: index($sizes, $size)
     &.is-#{$i}