i18n-ru: prompts fixed
i18n-ru: update 'revsets' translation
i18n-ru: update 'revisions' translation
i18n-ru: sync with ad56fc55cbc3 (missing strings)
i18n-ru: sync with ad56fc55cbc3 (fuzzies)
merge with i18n
i18n-ru: syncronized with 45a01832cad1
i18n-ru: undo fix buildbot breakage

Buildbot complained:

   $ python check-translation.py *.po
+  ru.po:9576:fatal(promptchoice): number of choices differs between
msgid and msgstr
+  [1]

Prompt text was obviously wrong.. because it didn't include a prompt.
i18n-ru: fix RST breakage spotted by test-gendoc

test-gendoc complained:

   % extracting documentation from ru
   checking for parse errors
+  gendoc-ru.txt:5686: (WARNING/2) Field list ends without a blank
   line; unexpected unindent.
+  gendoc-ru.txt:8327: (WARNING/2) Definition list ends without a
   blank line; unexpected unindent.
merge with i18n