Merge branch 'en/am-abort-fix' into en/removing-untracked-fixes

* en/am-abort-fix:
  am: fix incorrect exit status on am fail to abort
  t4151: add a few am --abort tests
  git-am.txt: clarify --abort behavior

Documentation/git-am.txt

@@ -178,6 +178,8 @@ default.   You can use `--no-utf8` to override this.
 
 --abort::
 	Restore the original branch and abort the patching operation.
+	Revert contents of files involved in the am operation to their
+	pre-am state.
 
 --quit::
 	Abort the patching operation but keep HEAD and the index