message: Doc: Fix comment
diff: @@ -36,7 +36,7 @@ class DeprecatedCustomPropertySyntax extends CssRule {
  return warnings;
  }
  - // Convert `@apply(--foo);` to `@apply foo;`
  + // Convert `@apply(--foo);` to `@apply --foo;`
  private addAtApplyWarnings(
  node: shady.Node, parsedDocument: ParsedCssDocument,
  warnings: Warning[]) {
  