Merge branch 'rh/mergetool-regression-fix'

"git mergetool" without any pathspec on the command line that is
run from a subdirectory became no-op in Git v2.11 by mistake, which
has been fixed.

* rh/mergetool-regression-fix:
  mergetool: fix running in subdir when rerere enabled
  mergetool: take the "-O" out of $orderfile
  t7610: add test case for rerere+mergetool+subdir bug
  t7610: spell 'git reset --hard' consistently
  t7610: don't assume the checked-out commit
  t7610: always work on a test-specific branch
  t7610: delete some now-unnecessary 'git reset --hard' lines
  t7610: run 'git reset --hard' after each test to clean up
  t7610: don't rely on state from previous test
  t7610: use test_when_finished for cleanup tasks
  t7610: move setup code to the 'setup' test case
  t7610: update branch names to match test number
  rev-parse doc: pass "--" to rev-parse in the --prefix example
  .mailmap: record canonical email for Richard Hansen

.mailmap

@@ -192,6 +192,8 @@ Philippe Bruhat <book@cpan.org>
 Ralf Thielow <ralf.thielow@gmail.com> <ralf.thielow@googlemail.com>
 Ramsay Jones <ramsay@ramsayjones.plus.com> <ramsay@ramsay1.demon.co.uk>
 René Scharfe <l.s.r@web.de> <rene.scharfe@lsrfire.ath.cx>
+Richard Hansen <rhansen@rhansen.org> <hansenr@google.com>
+Richard Hansen <rhansen@rhansen.org> <rhansen@bbn.com>
 Robert Fitzsimons <robfitz@273k.net>
 Robert Shearman <robertshearman@gmail.com> <rob@codeweavers.com>
 Robert Zeh <robert.a.zeh@gmail.com>

Documentation/git-rev-parse.txt

@@ -91,7 +91,8 @@ repository.  For example:
 ----
 prefix=$(git rev-parse --show-prefix)
 cd "$(git rev-parse --show-toplevel)"
-eval "set -- $(git rev-parse --sq --prefix "$prefix" "$@")"
+# rev-parse provides the -- needed for 'set'
+eval "set $(git rev-parse --sq --prefix "$prefix" -- "$@")"
 ----
 
 --verify::

git-mergetool.sh

@@ -421,7 +421,7 @@ main () {
 			prompt=true
 			;;
 		-O*)
-			orderfile="$1"
+			orderfile="${1#-O}"
 			;;
 		--)
 			shift
@@ -454,6 +454,17 @@ main () {
 	merge_keep_backup="$(git config --bool mergetool.keepBackup || echo true)"
 	merge_keep_temporaries="$(git config --bool mergetool.keepTemporaries || echo false)"
 
+	prefix=$(git rev-parse --show-prefix) || exit 1
+	cd_to_toplevel
+
+	if test -n "$orderfile"
+	then
+		orderfile=$(
+			git rev-parse --prefix "$prefix" -- "$orderfile" |
+			sed -e 1d
+		)
+	fi
+
 	if test $# -eq 0 && test -e "$GIT_DIR/MERGE_RR"
 	then
 		set -- $(git rerere remaining)
@@ -461,13 +472,15 @@ main () {
 		then
 			print_noop_and_exit
 		fi
+	elif test $# -ge 0
+	then
+		# rev-parse provides the -- needed for 'set'
+		eval "set $(git rev-parse --sq --prefix "$prefix" -- "$@")"
 	fi
 
 	files=$(git -c core.quotePath=false \
 		diff --name-only --diff-filter=U \
-		${orderfile:+"$orderfile"} -- "$@")
-
-	cd_to_toplevel
+		${orderfile:+"-O$orderfile"} -- "$@")
 
 	if test -z "$files"
 	then