Run regression tests for lilypond-book (issue 2223). (issue 5569045)

[julien . rioux]

Reviewers: ,

Message:
Please review.

Description:
Run regression tests for lilypond-book (issue 2223).

Re-enable running the regtests in input/regression/lilypond-book.
Fix various typos, clarify what each input file tests for and
how the output should look, and fix the following problems:

collated-files.tely:
  Was linking to the input files rather than the output files
  generated by lilypond-book. The input files were thus not
  tested individually as it should but as included files.
  Fixed in the local GNUmakefile by an explicit rule for
  collated-files.list which tracks the output files.

suffix-texi:
  Failed, was not being preprocessed by lilypond-book but simply
  copied to the output folder. Fixed in the local GNUmakefile by
  adding a specific make rule for it.

tex-twocolumn:
  Failed, image had full-page width.
  Fixed in the input file by moving \twocolumn to the preamble.
  Column width detection in the body of the tex document is not
  yet implemented.

texinfo-language-detection:
  Suspicious, had a weird @lydoctitle popping up.
  Fixed in the input file by defining the @lydoctitle macro.

Please review this at http://codereview.appspot.com/5569045/

Affected files:
  M input/regression/lilypond-book/GNUmakefile
  M input/regression/lilypond-book/html-newline-after-tag.html
  M input/regression/lilypond-book/html-space-after-tag.html
  M input/regression/lilypond-book/html-version-newline.html
  M input/regression/lilypond-book/html-version.html
  M input/regression/lilypond-book/include3.ily
  M input/regression/lilypond-book/tex-comment-firstline.lytex
  M input/regression/lilypond-book/tex-graphics-package-added.lytex
  M input/regression/lilypond-book/tex-include-file.lytex
  M input/regression/lilypond-book/tex-include-options.lytex
  M input/regression/lilypond-book/tex-inline-lilypond.lytex
  M input/regression/lilypond-book/tex-lilypond-inside-itemize.lytex
  M input/regression/lilypond-book/tex-lilypond-inside-table.lytex
  M input/regression/lilypond-book/tex-musicxml-file-options.lytex
  M input/regression/lilypond-book/tex-musicxml-file.lytex
  M input/regression/lilypond-book/tex-paragraphs.lytex
  M input/regression/lilypond-book/tex-snippet-options.lytex
  M input/regression/lilypond-book/tex-twocolumn.lytex
  M input/regression/lilypond-book/tex-verbatim.lytex
  M input/regression/lilypond-book/tex-version.lytex
  M input/regression/lilypond-book/texinfo-include-language-detection.tely
  M input/regression/lilypond-book/texinfo-language-detection.tely
  M input/regression/lilypond-book/texinfo-musicxml-file-options.tely
  M input/regression/lilypond-book/texinfo-musicxml-file.tely
  A + input/regression/lilypond-book/texinfo-papersize-docs.tely