tests: use raw string in test-impexp-branch.t On first glance, the escaping of \s seems correct. However, the shell eats the escape and we're left with '\s` in the written file. Let's use a raw string so we don't have to double escape. Differential Revision: https://phab.mercurial-scm.org/D5973

phabricator: make user searches case-insensitive User names in conduit are case insensitive, but when looking for "FOO" it would return "foo" instead and we'd think the user didn't exist. So lower case both the query and the response when comparing them. Differential Revision: https://phab.mercurial-scm.org/D5934

exchange: raise error.Abort instead of ValueError Raising ValueError results in an uncaught exception and a traceback being printed. In the context of servers, it can result in an HTTP 500 and an exception being logged in the error log. I don't think this is proper behavior. The bundle2 code paths have a mechanism for translating an error.Abort into an error message reported to the clients. I think we should use that instead. This commit replaces some ValueError with Abort so that servers can error more gracefully. Differential Revision: https://phab.mercurial-scm.org/D5972