test-remove: make it pass on Mac OS X 10.5

tests: add highlight extension tests

tests: add tests for hgweb to test-keyword

Merge main and crew.

removed trailing spaces

ui: disallow newlines in usernames (issue1034)

update: no -C needed to switch branches without outstanding changes

coverage: deal with symlinked input paths (MacOSX issue) /tmp is symlinked in MacOSX therefore test scripts as well as python modules are installed in a symlinked location. coverage.py uses abspath() to normalize its inputs which fails if these are referencing real paths. Use realpath() instead.

Make churn an official extension

tiny tab cleanup