Lilypond-book: Auto-detect linewidth and exampleindent in texinfo mode (issue 4938044)

[dak]

http://codereview.appspot.com/4938044/diff/7001/python/book_texinfo.py
File python/book_texinfo.py (right):

http://codereview.appspot.com/4938044/diff/7001/python/book_texinfo.py#newcode228
python/book_texinfo.py:228: val = float (m.group (1))/72
This would be wrong.  TeX's principal unit, the pt or printer's point,
is 1in/72.27.  You are confusing this with PostScript points, 1in/72,
which TeX calls bp (big points).

http://codereview.appspot.com/4938044/