[PATCH v2 0/5] Fix a bug in configuration parsing, and improve tests and documentation

This series is an evolvement from another recent series, [1] as a result
of a decision to fix a longstanding bug in the parsing of configuration
option values, instead of documenting the status quo. [2][3]

The bufgix introduced in this series _should_ have no hidden negative
effects.  All of the configuration-related tests, both the old and the
new ones, pass with the patches applied.

Changes in v2 are described in each of the patches.

[1] https://lore.kernel.org/git/cover.1710258538.git.dsimic@manjaro.org/T/#u (local)
[2] https://lore.kernel.org/git/ff7b0a2ead90ad9a9456141da5e4df4a@manjaro.org/ (local)
[3] https://lore.kernel.org/git/11be11f231f3bf41d0245c780c20693f@manjaro.org/ (local)

Dragan Simic (5):
  config: minor addition of whitespace
  config: really keep value-internal whitespace verbatim
  test: introduce new x_to_tab() helper function
  t1300: add more tests for whitespace and inline comments
  config.txt: describe handling of whitespace further

 Documentation/config.txt |  19 ++++---
 config.c                 |  15 ++++--
 t/t1300-config.sh        | 114 +++++++++++++++++++++++++++++++++++++--
 t/test-lib-functions.sh  |   4 ++
 4 files changed, 135 insertions(+), 17 deletions(-)