Better error message for mistaken usage of chibi-doc. Fixes issue #177.
Better error message for mistaken usage of chibi-doc.
Fixes issue #177.

holmescn/chibi-scheme,holmescn/chibi-scheme,norton/chibi-scheme,norton/chibi-scheme,holmescn/chibi-scheme,norton/chibi-scheme,norton/chibi-scheme,norton/chibi-scheme,norton/chibi-scheme,holmescn/chibi-scheme,holmescn/chibi-scheme