Fix warning messages when loading typing_counter.py

[blackbit42]

2026-01-02 01:24:44 Plugins loaded: alias, buflist, charset, exec, fifo, fset, irc, logger, python, relay, script, spell, trigger, typing, xfer
2026-01-02 01:34:43 python: stdout/stderr (?): /home/blackbit/.weechat/python/autoload/typing_counter.py:118: SyntaxWarning: invalid escape sequence '$'
2026-01-02 01:34:43 python: stdout/stderr (?): regex_color=re.compile('${([^\{\}]+)}')
2026-01-02 01:34:43 python: stdout/stderr (?): /home/blackbit/.weechat/python/autoload/typing_counter.py:121: SyntaxWarning: invalid escape sequence '{'
2026-01-02 01:34:43 python: stdout/stderr (?): regex_optional_tags=re.compile('%{[^\{\}]+}')
2026-01-02 01:34:43 python scripts loaded: autosort, bitlbee_typing_notice, bufsave, postpone, prism, typing_counter

Script info

• Script name: 
• Version: 

• Requirements: 

• Min WeeChat version: 

• Script tags: 

Description

Checklist (new script)

• Single commit, single file added
• Commit message: New script name.py: short description…
• No similar script already exists
• Name: max 32 chars, only lower case letters, digits and underscores
• Unique name, does not already exist in repository
• No shebang on the first line
• Comment in script with name/pseudo, e-mail and license using SPDX tags (see Contributing guide)
• Only English in code/comments
• Pure WeeChat API used, no extra API
• Function hook_url, hook_process or hook_process_hashtable is used for any blocking call
• For Python script: works with Python 3 (Python 2 support is optional)
• Score 100 / 100 displayed by weechat-script-lint

Checklist (script update)

• Author has been contacted
• Single commit, single file added
• Commit message format: script_name.py X.Y: …
• Script version and Changelog have been updated
• For Python script: works with Python 3 (Python 2 support is optional)
• Score 100 / 100 displayed by weechat-script-lint

Checklist (script deletion)

• Author has been contacted
• Single commit, single file deleted
• Commit message format: Remove script name.py with reasons in description