c: Small diagnostics tweak - add missing ? after did you mean [PR93858]

2020-02-25  Jakub Jelinek  <jakub@redhat.com>

	PR c/93858
	* c-pragma.c (handle_pragma_diagnostic): Add missing ? after
	"did you mean" hint in diagnostics.

gcc/c-family/ChangeLog

+2020-02-25  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c/93858
+	* c-pragma.c (handle_pragma_diagnostic): Add missing ? after
+	"did you mean" hint in diagnostics.
+
 2020-02-15  Jason Merrill  <jason@redhat.com>
 
 	* c.opt: Add -std=c++20.

gcc/c-family/c-pragma.c

@@ -814,7 +814,7 @@ handle_pragma_diagnostic(cpp_reader *ARG_UNUSED(dummy))
       if (hint)
 	warning_at (loc, OPT_Wpragmas,
 		    "unknown option after %<#pragma GCC diagnostic%> kind;"
-		    " did you mean %<-%s%>", hint);
+		    " did you mean %<-%s%>?", hint);
       else
 	warning_at (loc, OPT_Wpragmas,
 		    "unknown option after %<#pragma GCC diagnostic%> kind");