cleanup: drop redundant character escapes outside of `[]`
Flagged by PyCharm. `@`, `:`, `<`, `>`, and `{` aren't special characters.
(I'm a bit surprised that it doesn't also want to unescape `}` in schemes.py.)
Differential Revision: https://phab.mercurial-scm.org/D7767
@echo off
powershell -NoProfile -ExecutionPolicy unrestricted -Command "& '%~dp0\editmergeps.ps1' %*"