Bugfix: SyntaxWarning: invalid escape sequence '\-'

[mdayaram]

I get the following error when running the latest ponysay on Python 3.12:

/usr/local/bin/ponysay/balloon.py:43: SyntaxWarning: invalid escape sequence '\-'
/usr/local/bin/ponysay/balloon.py:43: SyntaxWarning: invalid escape sequence '\-'

I believe the changes I made fix the issue, and the error is no longer present. However, I had trouble running ponysay directly from source, so I could only verify this by replicating the issue with a simple program and then issuing this fix.

[matthias4217]

This would fix #314. It has also been implemented in #313, although the latter also address other issues.

[mdayaram]

Ah, perfect! Glad to hear it's already in the works. Sorry for not double checking that myself. Will go ahead and close this then.