Leonardo de Moura fa03ae2a26 fix(library/elaborator): strength elaborator procedure for handling equality and convertability constraints ... This commit improves the condition for showing that an equality(and convertability) constraint cannot be solved. A nice consequence is that Lean produces nicer error messages. For example, the error message for unit test elab1.lean is more informative. Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>		2013-12-06 13:04:34 -08:00
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lean	fix(library/elaborator): strength elaborator procedure for handling equality and convertability constraints	2013-12-06 13:04:34 -08:00
lua	feat(library/tactic): use _tac suffix instead of _tactic like Isabelle	2013-12-05 20:06:32 -08:00