14.6.4.1 GOP-PROP 1 - python formatting

We will follow the indentation described in PEP-8. http://www.python.org/dev/peps/pep-0008/

• use 4 spaces per indentation level
• never mix tabs and spaces (for indentation)
• Code indented with a mixture of tabs and spaces should be converted to using spaces exclusively

  Once this is done, we should add python -tt to the build system to avoid such errors in the future.

There should be absolutely no tab characters for indentation in any .py file in lilypond git. All such files should be converted to use spaces only.

Discussions

https://lists.gnu.org/archive/html/lilypond-devel/2011-06/msg00060.html
https://lists.gnu.org/archive/html/lilypond-devel/2011-06/msg00084.html
https://lists.gnu.org/archive/html/lilypond-devel/2011-06/msg00310.html
https://lists.gnu.org/archive/html/lilypond-devel/2011-06/msg00574.html

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