Fixed the following issues:
1. gitstatus.py:
- Fixed broad IOError exception handling to catch specific OSError/FileNotFoundError
- Fixed unused variable warning by using _ for ignored stderr
2. proxy.py:
- Fixed os.path.expandvars usage that doesn't expand ~, changed to os.path.expanduser
- Fixed check_output call that was incorrectly passing a file path instead of command list
- Fixed missing space in env variable assignment for aliases
3. update_emoji.py:
- Fixed file handle leaks by using with statements for file operations
- Removed unnecessary .keys() call in dict iteration
4. cheatsheet.py:
- Fixed parse() function to handle lines without '=' character
- Fixed inefficient list comprehension using any() instead
- Fixed shadowing of built-in 'cheatsheet' function name
5. ssh-agent.py:
- Modernized string formatting from .format() to f-string
6. ssh-proxy.py:
- Fixed next() call without default value that crashes when no proxy env vars set
- Fixed missing exit code propagation from subprocess.call
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
