submit file1.txt's change but has been reCommit in a few minutes later!
push first and to see if i can discard changes
modify .gitignore file
change ignore file again,to see the actual result
change ignore file
ha ha
haha agagin
git rm command
git add -i,use git rebase command !
command git add -i
git commit command
che xiao ti jiao
isert# Please enter the commit message for your changes. Lines starting
cat file first

cat file second
use git commit --amend command
change file5,test reset command
change fiel3,test reset command
Revert "change file5,test reset command"

This reverts commit fa8a6ef7bc9cc9cd0ba659ea8e979d85e318f9fc.
test merge
commit 1
commit 2
commit 3