Merge branch 'nd/fetch-ref-summary'

Improve the look of the way "git fetch" reports what happened to
each ref that was fetched.

* nd/fetch-ref-summary:
  fetch: reduce duplicate in ref update status lines with placeholder
  fetch: align all "remote -> local" output
  fetch: change flag code for displaying tag update and deleted ref
  fetch: refactor ref update status formatting code
  git-fetch.txt: document fetch output

diff --cc Documentation/config.txt
Simple merge

diff --cc builtin/fetch.c
Simple merge

diff --cc t/t5510-fetch.sh
Simple merge