[Git] git rebase at master branch

[shijinkui]

type in git bash: git log --graph

Get so many merge lines. Please PMC consider rebase the master. It'll be harder to rebase along with commits growing. @wing328

[wing328]

@shijinkui thanks for the feedback but I think it would be hard for every PRs to be rebased on the latest master before merging as there're always PRs merging into master almost every single day.

(personally I don't mind people always rebase their PR on the latest master)