revset: inline isvalidfunc(), getfuncname() and getfuncargs() See the previous commit for why. These functions are also trivial.

revset: inline isvalidsymbol() and getsymbol() into _parsealiasdecl() Since I'm going to extract a common alias parser, I want to eliminate dependencies to the revset parsing rules. These functions are trivial, so we can go without them.

revset: remove redundant checks for parsed tree of alias If tree is a tuple, it must have at least one element. Also the length of node tuple is guaranteed by the syntax elements. (e.g. 'func' must have 3 items.) This change will help inlining these trivial functions in future patches.

py3: handle iter/iterkeys+iteritems python3 divergence in import-checker

py3: use print_function in import-checker

py3: use absolute_import in import-checker

run-tests: make _processoutput picky about optional globs 1ad0ddf8cccc enabled lines that were not matched to be found later in cases of jitter. Unfortunately, in this model an optional line would always jitter to the end when it is not present. That is not ideal. It would be possible to do better, by queuing all writes until the end in case an optional line jitters, but for now, it is simpler to assume optional lines have a fixed place in the stream.

py24: remove check-code py24 notation We require python2.6+

py3: convert hghave output to text Before this, Python3 generated: b'skipped: unknown feature: not-py3k\n'

py3: convert prereq bytes to string in run-tests Without this, run-tests would generate: WARNING: Did not find prerequisite tool: b'python3.5'