kettle-rb / token-resolver / 22275040253

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🐛 Prevent false positive with match & character restriction on tokens

- `Config#segment_pattern` option — a parslet character class constraining which characters
  are valid inside token segments (default: `"[A-Za-z0-9_]"`). This prevents false positive
  token matches against Ruby block parameters (`{ |x| expr }`), shell variable expansion
  (`${VAR:+val}`), and other syntax that structurally resembles tokens but contains spaces
  or punctuation in the "segments".
- `Resolve#resolve` now validates replacement keys against the config's `segment_pattern` and
  raises `ArgumentError` if a key contains characters that the grammar would never parse.

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