In 353131 we updated parser to consume/skip comments to prevent syntax errors when parsing directives. Depends on the case, tests expect the Parser to

• leave comments in the same space (see /*{comment}*/
• skip comments (see /* Safari */)
• move comments (see /* and Chrome */)

For example

@-webkit-keyframes /* Safari */ hover /* and Chrome */ {
  0% {
    color: red;
  }
}
.bg {
  background-image: linear-gradient(#333 /*{comment}*/, #111);
}

should become

@-webkit-keyframes hover {
  /* and Chrome */
  0% {
    color: red;
  }
}
.bg {
  background-image: linear-gradient(#333 /*{comment}*/, #111);
}

To make it happen we need to match Less2 behaviour and start storing comments in the commentStore. Versions 2.5.3 and 3.13.1 handle comments in the same matter, therefore with this change we should reach the feature parity with 3.13.1.

The ParserInput.skipWhitespace method skips all white space, and it parses comments. Comments are not skipped/ignored but stored in the commentStore for later use.
This ticket targets fixes for parsing comments.less and comments2.less for both versions (2.5.3 and 3.13.1).

Definition of done:

• lessjs-2.5.3/overrides/comments.css is removed
• lessjs-2.5.3/less/comments2.less is passing, fixture removed from KNOWN_ERRORS
• lessjs-3.13.1/less/comments.css is passing, fixture removed from KNOWN_ERRORS
• lessjs-3.13/1/less/comments2.less is passing, fixture removed from KNOWN_ERRORS

Failing fixture:

... parse /test/Fixtures/lessjs-2.5.3/less/comments2.less Fail
--- actual
+++ /test/Fixtures/lessjs-2.5.3/css/comments2.css
@@ -1,7 +1,12 @@
-ParseError: unmatched `/*` in comments2.less on line 4, column 53
-2| @-webkit-keyframes hover /* Safari and Chrome */{  }
-3| .bg {
-4|   background-image: linear-gradient(#333 /*{comment}*/, #111);
-5| }
-6| #planadvisor,
-7| /*comment*//*comment*/
+@-webkit-keyframes hover {
+  /* Safari and Chrome */
+}
+.bg {
+  background-image: linear-gradient(#333 /*{comment}*/, #111);
+}
+#planadvisor,
+.first,
+.planning {
+  margin: 10px;
+  total-width: (1 * 6em * 12) + (2em * 12);
+}