merge: grammofix in please-commit-before-merge message

Signed-off-by: Alex Henrie <alexhenrie24@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

advice.c

@@ -100,7 +100,7 @@ void NORETURN die_conclude_merge(void)
 {
 	error(_("You have not concluded your merge (MERGE_HEAD exists)."));
 	if (advice_resolve_conflict)
-		advise(_("Please, commit your changes before you can merge."));
+		advise(_("Please, commit your changes before merging."));
 	die(_("Exiting because of unfinished merge."));
 }
 

contrib/examples/git-pull.sh

@@ -29,7 +29,7 @@ as appropriate to mark resolution and make a commit.")"
 die_merge () {
     if [ $(git config --bool --get advice.resolveConflict || echo true) = "true" ]; then
 	die "$(gettext "You have not concluded your merge (MERGE_HEAD exists).
-Please, commit your changes before you can merge.")"
+Please, commit your changes before merging.")"
     else
 	die "$(gettext "You have not concluded your merge (MERGE_HEAD exists).")"
     fi