Merge branch 'js/branch-track-inherit'

"git branch -h" incorrectly said "--track[=direct|inherit]",
implying that "--trackinherit" is a valid option, which has been
corrected.

* js/branch-track-inherit:
  branch,checkout: fix --track usage strings

diff --cc builtin/branch.c
Simple merge

diff --cc builtin/checkout.c
Simple merge