完整的提交的警告信息如下
warning: push.default is unset; its implicit value has changed in Git 2.0 from 'matching' to 'simple'. To squelch this message and maintain the traditional behavior, use: git config --global push.default matching To squelch this message and adopt the new behavior now, use: git config --global push.default simple When push.default is set to 'matching', git will push local branches to the remote branches that already exist with the same name. Since Git 2.0, Git defaults to the more conservative 'simple' behavior, which only pushes the current branch to the corresponding remote branch that 'git pull' uses to update the current branch. See 'git help config' and search for 'push.default' for further information. (the 'simple' mode was introduced in Git 1.7.11. Use the similar mode 'current' instead of 'simple' if you sometimes use older versions of Git)
Everything up-to-date
最后还是提示了 Everything up-to-data （我本地没有更新代码） 说明最后的结果还是提交上去的 结果是并不会影响push的结果， 这只是一个警告 按照提示运行：git config --global push.default matching 或者 git config --global push.default simple命令，以后再push就不会有警告了
push.default matching和push.default simple的区别：
push.default设置maching的意思是：git push 会把你本地所有分支push到名称相对应的远程主机上。这意味着可能你会在不经意间push一些你原本没打算push的分支。
push.default设置成simple的意思是：git push仅仅把当前所在分支push到从当初git pull pull下来的那个对应分支上，另外，这个过程也会同时检查各个分支的名称是否相对应。