Merge branch 'jk/rebase-no-autostash' into maint

There was no way to defeat a configured rebase.autostash variable
from the command line, as "git rebase --no-autostash" was missing.

* jk/rebase-no-autostash:
  Documentation/git-rebase: fix --no-autostash formatting
  rebase: support --no-autostash

Documentation/git-rebase.txt

@@ -434,7 +434,8 @@ If the '--autosquash' option is enabled by default using the
 configuration variable `rebase.autoSquash`, this option can be
 used to override and disable this setting.
 
---[no-]autostash::
+--autostash::
+--no-autostash::
 	Automatically create a temporary stash before the operation
 	begins, and apply it after the operation ends.  This means
 	that you can run rebase on a dirty worktree.  However, use

git-rebase.sh

@@ -14,7 +14,7 @@ git-rebase --continue | --abort | --skip | --edit-todo
  Available options are
 v,verbose!         display a diffstat of what changed upstream
 q,quiet!           be quiet. implies --no-stat
-autostash!         automatically stash/stash pop before and after
+autostash          automatically stash/stash pop before and after
 fork-point         use 'merge-base --fork-point' to refine upstream
 onto=!             rebase onto given branch instead of upstream
 p,preserve-merges! try to recreate merges instead of ignoring them
@@ -292,6 +292,9 @@ do
 	--autostash)
 		autostash=true
 		;;
+	--no-autostash)
+		autostash=false
+		;;
 	--verbose)
 		verbose=t
 		diffstat=t

t/t3420-rebase-autostash.sh

@@ -37,6 +37,16 @@ testrebase() {
 	type=$1
 	dotest=$2
 
+	test_expect_success "rebase$type: dirty worktree, --no-autostash" '
+		test_config rebase.autostash true &&
+		git reset --hard &&
+		git checkout -b rebased-feature-branch feature-branch &&
+		test_when_finished git branch -D rebased-feature-branch &&
+		test_when_finished git checkout feature-branch &&
+		echo dirty >>file3 &&
+		test_must_fail git rebase$type --no-autostash unrelated-onto-branch
+	'
+
 	test_expect_success "rebase$type: dirty worktree, non-conflicting rebase" '
 		test_config rebase.autostash true &&
 		git reset --hard &&