Merge branch 'ab/c-translators-comment-style' into maint

Update the C style recommendation for notes for translators, as
recent versions of gettext tools can work with our style of
multi-line comments.

* ab/c-translators-comment-style:
  C style: use standard style for "TRANSLATORS" comments

Documentation/CodingGuidelines

@@ -256,12 +256,12 @@ For C programs:
 
    Note however that a comment that explains a translatable string to
    translators uses a convention of starting with a magic token
-   "TRANSLATORS: " immediately after the opening delimiter, even when
-   it spans multiple lines.  We do not add an asterisk at the beginning
-   of each line, either.  E.g.
+   "TRANSLATORS: ", e.g.
 
-	/* TRANSLATORS: here is a comment that explains the string
-	   to be translated, that follows immediately after it */
+	/*
+	 * TRANSLATORS: here is a comment that explains the string to
+	 * be translated, that follows immediately after it.
+	 */
 	_("Here is a translatable string explained by the above.");
 
  - Double negation is often harder to understand than no negation