[python] Handle stemmer names with underscore

Previously the code generated in __init__.py didn't convert to camel
case correctly if there was an underscore.

python/create_init.py

@@ -15,7 +15,7 @@
     match = filematch.match(pyscript)
     if (match):
         langname = match.group(1)
-        titlecase = langname.title()
+        titlecase = re.sub(r"_", "", langname.title())
         languages.append("    '%(lang)s': %(title)sStemmer," % {'lang': langname, 'title': titlecase})
         imports.append('from .%(lang)s_stemmer import %(title)sStemmer' % {'lang': langname, 'title': titlecase})
 imports.sort()