copyediting

less/type.less

@@ -126,7 +126,7 @@ cite    { font-style: normal; }
 // For now we'll leave these alongside the text classes until v4 when we can
 // safely shift things around (per SemVer rules).
 .bg-primary {
-  // Given the contrast here, this is the only class to have it's color inverted
+  // Given the contrast here, this is the only class to have its color inverted
   // automatically.
   color: #fff;
   background-color: @brand-primary;