Personal branch created
add .md write guide
modify git_guide.md
modify git_guide.md 2
modify git_guide.md
test devA_a branch
test devA_b branch
test devA_c branch
<Auto Generated by Git>
merge devA_b and devA
<Auto Generated by Git>
merge devA_c and devA_b
<Auto Generated by Git>
merge devA and develop