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This commit implements the .tex-based online help system in LON-CAPA. It may be necessary to manually run loncom/build/help_graphics_converter.pl and doc/help/rebuildLabelHash.pl after a cvs update, and loncapa_apache.conf may need to be manually copied to /etc. (The loncapafiles.lpml has been updated.) After merging this, the URL http://[loncapahost]/adm/help/Foils.hlp should display a help file. Also, some *very* out-of-date files have been removed from the /doc directory.
The formula evaluator can not handle things of the form {}``x + - y''. If you have a random variable that may be positive or negative (as in the example following this section), you can try wrapping the references to that variable in parenthesis. As always, it is a good idea to try out several randomized versions of your problems to make sure everything works correctly.