$ cat init.rb | pygmentize -f html -l ruby

*** Error while highlighting:
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc4 in position 16: ordinal not in range(128)
   (file "/Library/Python/2.5/site-packages/Pygments-0.9-py2.5.egg/pygments/lexer.py", line 151, in get_tokens)

$ pygmentize init.rb
<works>