show: use filter() function to strip "tip" tag Before, an empty tag "" was inserted in place of "tip", resulting in double spaces.

templater: extend filter() to accept template expression for emptiness test This utilizes the pass-by-name nature of template arguments.

templater: introduce filter() function to remove empty items from list The primary use case is to filter out "tip" from a list of tags.

templater: fix truth testing of integer 0 taken from a list/dict Broken at f9c426385853. bool(python_value) shouldn't be used here since an integer 0 has to be truthy for backward compatibility.

formatter: look for template symbols from the associated name Otherwise symbolsused() would fail if a named template is specified with -T.

py3: add b'' prefixes in tests/test-obsolete-divergent.t This makes the test pass on Python 3. # skip-blame because just b'' prefixes. Differential Revision: https://phab.mercurial-scm.org/D3832

py3: use stringutil.pprint() to print NoneType Before this patch, when running test-debugcommands.t, we get a TypeError because NoneType can't be converted into bytes. This patch uses stringutil.pprint() to print the ui._colormode. We are now close to getting test-debugcommands.t passing on Python 3. Differential Revision: https://phab.mercurial-scm.org/D3831

rebase: make dry-run return 1 or 0 according to result In dry-run mode, if there is no conflict return 0, if any then return 1 Differential Revision: https://phab.mercurial-scm.org/D3829