git-分支管理-解决冲突
1. 创建git分支：git checkout -b feature1
2. 修改readme.txt最后一行，改为：
Creating a new branch is quick AND simple.
3. 在feature1分支上提交：
git add readme.txt
$ git commit -m "AND simple"
[feature1 14096d0] AND simple
1 file changed, 1 insertion(+), 1 deletion(-)
4. 切换到master分支
git checkout master
$ git checkout master
Switched to branch 'master'
Your branch is ahead of 'origin/master' by 1 commit.
(use "git push" to publish your local commits)
5. 在master分支上把readme.txt文件的最后一行改为：
Creating a new branch is quick & simple.
6. 在master分支上提交：
$ git add readme.txt
$ git commit -m "& simple"
[master 5dc6824] & simple
1 file changed, 1 insertion(+), 1 deletion(-)
7. 现在，master分支和feature1分支各自都分别有新的提交，变成了这样：
这种情况下，Git无法执行“快速合并”，只能试图把各自的修改合并起来，但这种合并就可能会有冲突，我们试试看：
$ git merge feature1
Auto-merging readme.txt
CONFLICT (content): Merge conflict in readme.txt
Automatic merge failed; fix conflicts and then commit the result.
果然冲突了！Git告诉我们，readme.txt文件存在冲突，必须手动解决冲突后再提交。git status也可以告诉我们冲突的文件：
$ git status
On branch master
Your branch is ahead of 'origin/master' by 2 commits.
(use "git push" to publish your local commits)
You have unmerged paths.
(fix conflicts and run "git commit")
(use "git merge --abort" to abort the merge)
Unmerged paths:
(use "git add <file>..." to mark resolution)
both modified: readme.txt
no changes added to commit (use "git add" and/or "git commit -a")
我们可以直接查看readme.txt的内容：
Git is a distributed version control system.
Git is free software distributed under the GPL.
Git has a mutable index called stage.
Git tracks changes of files.
<<<<<<< HEAD
Creating a new branch is quick & simple.
=======
Creating a new branch is quick AND simple.
>>>>>>> feature1
Git用<<<<<<<，=======，>>>>>>>标记出不同分支的内容，我们修改如下后保存：
Creating a new branch is quick and simple.
再提交：
$ git add readme.txt
$ git commit -m "conflict fixed"
[master cf810e4] conflict fixed
现在，master分支和feature1分支变成了下图所示：
删除分支：git branch -d feature1
英文状态下按Q可以退出git log