code format cleanup Principal class
remove unneeded including ApplicationHelper from helper tests
remove unneeded 'redmine/field_format' requirement from FieldFormatTest
fix typo redcarpet requirement in lib/redmine.rb (#15520)
fix Pagination helper test class name
Merged r12456 from trunk to 2.3-stable (#15756)
change requirement in bazaar lib as same with other scm libs.
Merged r12456 from trunk to 2.4-stable (#15756)
Traditional Chinese translation updated by ChunChang Lo (#15764)
change requirement in bazaar lib as same with other scm libs (#15756)
backport r12453 AbstractAdapter change to 2.3-stable (#15756)
