Substitution style fails in 3.7.0

[jdkato]

Discussed in #877

^{Originally posted by daobrien July 25, 2024}
We have the following style that works in version 3.6.1:

---
extends: substitution
message: "Use '%s' instead of '%s'."
ignorecase: false
level: error
nonword: true
action:
  name: replace
swap:
  '\b(?:[Ee]\.[Gg]\.)': for example
  '\b(?:[Ii]\.[Ee]\.)': that is
  '\b(?:[Ee][Tt][Cc]\.)': and so on
  '\b(?:[Vv][Ss]\.)': versus
  '\b(?:[Vv][Ss]\s)(?!Code)': versus

TL;DR Replace e.g., i.e., etc., with their expansions.

One notable exception is the last line, which ignores VS Code. But, in 3.7.0, this style does not match against vs and I can't work out why. Did a bug sneak in? Do I need to tweak my regex a bit more (how?).

Thanks for any help.