Merge branch 'ma/test-quote-cleanup'

Test cleanup.

* ma/test-quote-cleanup:
  t4104: modernize and simplify quoting
  t: don't spuriously close and reopen quotes

diff --cc t/t4150-am.sh
Simple merge

diff --cc t/t4200-rerere.sh
Simple merge

diff --cc t/t5302-pack-index.sh
Simple merge

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