incorrect position reported using negative lookbehinds

[sunnyzanchi]

Check for existing issues

• Completed

Environment

macOS
Homebrew
vale version 2.30.0

Describe the bug / provide steps to reproduce it

hi! i think i've found a bug. when using a negative lookbehind in a substitution rule, the position is reported incorrectly if there are two occurrences on the same line. this is the rule i'm using

swap:
  '(?<!IP )address': discuss

and the file i'm using

# test

this is an IP address: 192.168.0.1. we should address this

expected:

• error should be found at 3:47

actual:

• error is reported at 3:15

this isn't an issue when the two occurrences of "address" are on different lines. this file

# test

this is an IP address: 192.168.0.1.
we should address this

correctly reports the error at 4:11

reproduction

repo: https://github.com/sunnyzanchi/vale-negative-lookbehind-bug

clone the repo and run cat *.md && vale *.md