Merge branch 'sv/t7001-modernize'

Test script modernization.

* sv/t7001-modernize:
  t7001: use `test` rather than `[`
  t7001: use here-docs instead of echo
  t7001: put each command on a separate line
  t7001: use '>' rather than 'touch'
  t7001: avoid using `cd` outside of subshells
  t7001: remove whitespace after redirect operators
  t7001: modernize subshell formatting
  t7001: remove unnecessary blank lines
  t7001: indent with TABs instead of spaces
  t7001: modernize test formatting

Author: gitster