[commonqt-devel] Tests and minor changes to :override

Hi, I have just pushed minor changes and tests for the method overriding syntax. - Added a first test case checking that :override works at all. - Fix function spec parsing to signal an error on invalid specs. - Extend function spec parsing to macroexpand the form. Test changes seem harmless enough that I've pushed them directly to the main repo, but just in case the usual request: Please test! d.