v0.6.0

Added

• CLICOLOR_FORCE (any non-empty value) forces coloured output in the default
  --color auto mode even when stdout is not a terminal (e.g. a pipe).
  NO_COLOR still takes precedence when both are set, and an explicit
  --color always|never overrides both.

Changed

• Result-diff validation now rejects a change-free (all-context) hunk with a
  dedicated NoChangeHunk error. Such a hunk balances the header counts but
  git apply rejects it; it is unreachable from a real git diff and only
  possible from a synthetic patch.
• The parser no longer appends body lines past the counts declared in a hunk
  header: once a side's declared count is exhausted, a further line of that kind
  ends the hunk instead of being absorbed into it. Well-formed git diffs are
  unaffected.