Merge branch 'ah/cleanups'

Miscellaneous code clean-ups.

* ah/cleanups:
  git_mkstemps_mode(): replace magic numbers with computed value
  wrapper: use a loop instead of repetitive statements
  diffcore-break: use a goto instead of a redundant if statement
  commit-graph: remove a duplicate assignment

diff --cc commit-graph.c
Simple merge

diff --cc wrapper.c
Simple merge