commit abc.txt
add aaa.txt
aa
aaaa
add abc.txt
haha
delete aaa.txt
aaa
haha
fdsafa
dd
aaaa
aaaa
rename
modify 2.log

xpan modify 2.log haha
pan add abc.txt

also commit 2.log
Merge branch 'master' of https://github.com/panpanf/helloworld