misc comments

[Juergen Reuter]

Hi,

just noticed:

* buildscripts/mf-to-table.py contains the line:

                        name = re.sub ('-', 'M', name)

  This substitution may be necessary for some parts of the backend,
  but it is also applied to the font table in appendix C.3 of the manual, 
  which AFAICS is wrong (at least for flat accidentals and noteheads with 
  negative duration log).

* Similarly, the rule

                tex_string = re.sub ('_', r'\\_' , m['name'])

  now produces "\_" instead of "_" in appendix C.3.

Greetings,
Jürgen