netcmd: move comment above class to docstring

Signed-off-by: Rob van der Linde <rob@catalyst.net.nz>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>

python/samba/netcmd/__init__.py

@@ -63,10 +63,9 @@ class Option(SambaOption):
         return value
 
 
-# This help formatter does text wrapping and preserves newlines
-
-
 class PlainHelpFormatter(optparse.IndentedHelpFormatter):
+    """This help formatter does text wrapping and preserves newlines."""
+
     def format_description(self, description=""):
         desc_width = self.width - self.current_indent
         indent = " " * self.current_indent