Merge branch 'ds/config-internal-whitespace-fix'

"git config" corrupted literal HT characters written in the
configuration file as part of a value, which has been corrected.

* ds/config-internal-whitespace-fix:
  config.txt: describe handling of whitespace further
  t1300: add more tests for whitespace and inline comments
  config: really keep value-internal whitespace verbatim
  config: minor addition of whitespace

diff --cc Documentation/config.txt
Simple merge

diff --cc config.c
Simple merge

diff --cc t/t1300-config.sh
Simple merge