Modify to perform "---" to "&mdash;" conversion outside of verbatim-like environments.  The list of verbatim-like environments is a defined by a variable in main().
Modify to perform "---" to "&mdash;" conversion outside of
verbatim-like environments.  The list of verbatim-like environments is
a defined by a variable in main().

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator