http://lists.gnu.org/archive/html/emacs-devel/2010-03/msg01280.html
* replace.el (occur-accumulate-lines): Add optional arg `pt'.
(occur-engine): Add local variables `ret', `prev-after-lines',
`prev-lines'. Use more arguments for `occur-context-lines'.
Set first elem of its returned list to `data', and the second elem
to `prev-after-lines'. Don't print the separator line.
In the end, print remaining context after-lines.
(occur-context-lines): Add new arguments `begpt', `endpt',
`lines', `prev-lines', `prev-after-lines'. Rewrite to combine
after-lines of the previous match with before-lines of the
current match and not overlap them. Return a list with two
values: the output line and the list of context after-lines.
* search.texi (Other Repeating Search): Remove line that `occur'
can not handle multiline matches.
* occur-testsuite.el (occur-tests): Add tests for context lines.
(icalendar-testsuite--run-function-tests):
Add icalendar-testsuite--test-datestring-to-isodate,
icalendar-testsuite--test-datetime-to-diary-date, and
icalendar-testsuite--test-calendar-style.
(icalendar-testsuite--test-format-ical-event):
(icalendar-testsuite--test-parse-summary-and-rest): Doc fix.
Remove european-calendar-style.
(icalendar-testsuite--get-ical-event): Doc fix.
(icalendar-testsuite--test-first-weekday-of-year):
(icalendar-testsuite--run-cycle-tests): Add doc string.
(icalendar-testsuite--test-datestring-to-isodate):
(icalendar-testsuite--test-datetime-to-diary-date):
(icalendar-testsuite--test-calendar-style): New functions.
(icalendar-testsuite--test-export): Handle iso date style.
New arg INPUT-ISO. Use calendar-date-style.
(icalendar-testsuite--test-import): Handle iso date style.
New arg EXPECTED-ISO. Use calendar-date-style.
(icalendar-testsuite--test-cycle): Handle iso date style.
(icalendar-testsuite--run-import-tests):
(icalendar-testsuite--run-export-tests):
(icalendar-testsuite--run-real-world-tests): Add iso style tests.
