* src/ltlast/unop.cc: Perform the simplification. * src/ltlast/unop.hh, doc/tl/tl.tex: Document it. * src/ltltest/equals.test: Adjust test cases.
* doc/tl/Makefile.am, doc/tl/tl.tex, doc/tl/tl.bib: New files. * doc/Makefile.am (SUBDIRS): Recurse into tl/. * configure.ac: Output doc/tl/Makefile * README: Describe doc/tl/.