python3: whitelist an additional 11 tests I think these are mostly the result of Pulkit's recent work. Thanks! Differential Revision: https://phab.mercurial-scm.org/D2078

ui: add explicit path to write prompt text bypassing buffers The prompt= flag was added at e35d7f131483, when colorui had its own write() function. Since we've merged colorui to ui, we can simply call the unbuffered write() function.

ui: write prompt text in ui.prompt(), not in ui._readline() self.label() is replaced by label= option, which should make it clearer why we can't pass the text to raw_input(prompt).

logcmdutil: mark changesetprinter.showpatch() as private

logcmdutil: drop default arguments from changesetdisplayer/templater() calls

logcmdutil: make default parameters of changesetprinters consistent

mdiff: use str.startswith/endswith() instead of slicing