i18n: fix "% inside _()" problems Before this patch, "contrib/check-code.py" can't detect these problems, because the regexp pattern to detect "% inside _()" doesn't suppose the case that format string consists of multiple string components concatenated implicitly or explicitly, This patch does below for that regexp pattern to detect "% inside _()" problems in such case. - put "+" into separator part ("[ \t\n]") for explicit concatenation ("...." + "...." style) - enclose "component and separator" part by "(?:....)+" for concatenation itself ("...." "...." or "...." + "....")

i18n: fix "% inside _()" problems Before this patch, "contrib/check-code.py" can't detect these problems, because the regexp pattern to detect "% inside _()" doesn't suppose the case that the format string and "%" aren't placed in the same line. This patch replaces "\s" in that regexp pattern with "[ \t\n]" to detect "% inside _()" problems in such case. "[\s\n]" can't be used in this purpose, because "\s" is automatically replaced with "[ \t]" by "_preparepats()" and "\s" in "[]" causes nested "[]" unexpectedly.

merge: fix lack of "%s" in format string causing TypeError at runtime

i18n-pt_BR: synchronized with c57c9cece645

i18n-ja: synchronized with e259d4c462b5

bundle2: support unbundling empty part We augment the unbundler to make it able to unbundle the empty part we are now able to bundle.

revset: raise ValueError when calling min or max on empty smartset min([]) raise a ValueError, we do the same thing in smartset.min() and smartset.max() for the sake of consistency. The min/amax test are greatly improved in the process to prevent this familly of regression

revpair: smartset compatibility Since recent revset changes, revrange now return a smartset. This smart set probably does not support indexing (_addset does not). This led to crash. Instead when the smartset is ordered we use the `min` and `max` method of smart set. Otherwise we turn is into a list and use indexing on it. The tests have been updated to catch such regression.

revsetbenchmark: add entry for ::rev:: Revsets of the form ::rev:: were identified as the source behind the regressions in issue 4201. Ensure we have explicit coverage of that revset.

merge with stable This should correct an earlier couple of bad merges (5433856b2558 and 596960a4ad0d, now pruned) that accidentally brought in a change that had been marked obsolete (244ac996a821).