[PATCH 0/6] parse-options: long option parsing fixes and cleanup

Fix two corner cases in patches 1 and 4, refactor the code in patches 2 and 3 to prepare the second fix, bonus patches 5 and 6 simplify the code and improve readability.

  parse-options: recognize abbreviated negated option with arg
  parse-options: set arg of abbreviated option lazily
  parse-options: factor out register_abbrev() and struct parsed_option
  parse-options: detect ambiguous self-negation
  parse-options: normalize arg and long_name before comparison
  parse-options: rearrange long_name matching code

 parse-options.c               | 137 ++++++++++++++++++----------------
 t/t0040-parse-options.sh      |  16 ++++
 t/t1502-rev-parse-parseopt.sh |  11 +++
 3 files changed, 100 insertions(+), 64 deletions(-)

-- 2.44.0