* src/support/os.[Ch]
(python): new function, return the python command
* lib/lyx2lyx/lyx_1_5.py
(revert_font_settings): replace tabs with spaces
The rest is simply s/python/python -tt/ and
s/"python"/lyx::support::os::python()/ where appropriate.
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@14270 a592a061-630c-0410-9148-cb99ea01b6c8
