parser: Add :buffer parsing support
tests: Add :buffer parsing tests
parser: Record that parsing some more :b* commands also works
tests: Test some more :b* commands parsing
parser: Add support for parsing :behave
tests: Add :behave command tests
parser: Add :breakadd/…del/:profile parsing support
printer: Add :break…/:profile printing support
tests: Add :break…/:profile parser tests
parser: Add support for parsing :cbuffer and friends
printer/tests: Add tests for :cbuffer and friends parsing
parser/tests: Record and test that :caddfile is also correctly parsed
parser/tests: Add support for parsing aligning commands
parser/tests: Record that :checktime is also parsed correctly
parser/printer/tests: Add :clist/:llist parsing support