hv.c: Clarify uvar comment

It was not clear that it referred to uvar magic.

diff --git a/hv.c b/hv.c
index cbeed30..a2db86a 100644 (file)
--- a/hv.c
+++ b/hv.c
@@ -750,7 +750,8 @@ Perl_hv_common(pTHX_ HV *hv, SV *keysv, const char *key, STRLEN klen,
               recursive call would call the key conversion routine again.
               However, as we replace the original key with the converted
               key, this would result in a double conversion, which would show
-              up as a bug if the conversion routine is not idempotent.  */
+              up as a bug if the conversion routine is not idempotent.
+              Hence the use of HV_DISABLE_UVAR_XKEY.  */
            return hv_common(hv, keysv, key, klen, flags,
                             HV_FETCH_ISSTORE|HV_DISABLE_UVAR_XKEY|return_svp,
                             val, hash);