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C and C++ have Doxygen keywords from: http://www.stack.nl/~dimitri/doxygen/commands.html Vala and Genie have Doxygen keywords and Valadoc keywords from: http://valadoc.org/#!wiki=markup
With newer GTK+ releases, leaving this field blank causes the "Recent Files" "feature" to be used rather the the expected current working directory. No replacement text added to explain the new behaviour since it would be incorrect with older GTK+ versions, would likely be incorrect on Windows with native dialogs and it will possibly be reverted in GTK+ in the future. Recenerate HTML manual, including previous changes from other commits.
The selection foreground and background are not changed unless the respective 3rd or 4th field is true (see highlighting.c:790).
I broke them in ca922e0 Now the two encoding combo boxes shares the same data, which is built only once.
It got removed by accident in commit c85b89a "Port more of the Project properties dialog to Glade"