stash: don't show internal implementation details

git stash push uses other git commands internally.  Currently it only
passes the -q flag to those if the -q flag is passed to git stash.  when
using 'git stash push -p -q --no-keep-index', it doesn't even pass the
flag on to the internal reset at all.

It really is enough for the user to know that the stash is created,
without bothering them with the internal details of what's happening.
Always pass the -q flag to the internal git clean and git reset
commands, to avoid unnecessary and potentially confusing output.

Reported-by: Jeff King <peff@peff.net>
Signed-off-by: Thomas Gummerer <t.gummerer@gmail.com>
Reviewed-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

git-stash.sh

@@ -299,12 +299,12 @@ push_stash () {
 	then
 		if test $# != 0
 		then
-			git reset ${GIT_QUIET:+-q} -- "$@"
+			git reset -q -- "$@"
 			git ls-files -z --modified -- "$@" |
 			git checkout-index -z --force --stdin
-			git clean --force ${GIT_QUIET:+-q} -d -- "$@"
+			git clean --force -q -d -- "$@"
 		else
-			git reset --hard ${GIT_QUIET:+-q}
+			git reset --hard -q
 		fi
 		test "$untracked" = "all" && CLEAN_X_OPTION=-x || CLEAN_X_OPTION=
 		if test -n "$untracked"
@@ -322,7 +322,7 @@ push_stash () {
 
 		if test "$keep_index" != "t"
 		then
-			git reset
+			git reset -q
 		fi
 	fi
 }

t/t3903-stash.sh

@@ -663,7 +663,7 @@ test_expect_success 'stash apply shows status same as git status (relative to cu
 		sane_unset GIT_MERGE_VERBOSITY &&
 		git stash apply
 	) |
-	sed -e 1,2d >actual && # drop "Saved..." and "HEAD is now..."
+	sed -e 1d >actual && # drop "Saved..."
 	test_i18ncmp expect actual
 '