Patterns containing double backslashes do not work

Patterns containing double backslashes will not work
When I pattern a link like the Windows file path "\\\\file.server\test", the test command works fine, but it doesn't actually overwrite the text in the chat.

```
Pattern: <\\\\(?P<file_path>[^\s<>]+)>
Template: [<\\${file_path}>](example: \\${file_path})
```