Add alternative for git checkout -

Author: shfshanyue

README.md

@@ -229,6 +229,12 @@ git branch --merged master
 git checkout -
 ```
 
+
+__Alternatives:__
+```sh
+git checkout @{-1}
+```
+
 ## Remove branches that have already been merged with master
 ```sh
 git branch --merged master | grep -v '^\*' | xargs -n 1 git branch -d

tips.json

@@ -34,7 +34,8 @@
     "tip": "git branch --merged master"
 }, {
     "title": "Quickly switch to the previous branch",
-    "tip": "git checkout -"
+    "tip": "git checkout -",
+    "alternatives": ["git checkout @{-1}"]
 }, {
     "title": "Remove branches that have already been merged with master",
     "tip": "git branch --merged master | grep -v '^\\*' | xargs -n 1 git branch -d",
@@ -458,4 +459,4 @@
 }, {
     "title": "Backup untracked files.",
     "tip": "git ls-files --others -i --exclude-standard | xargs zip untracked.zip"
-}]
+}]