test checkout of file lacking trailing \n over pserver protocol
This test reproduces the bug fixed in commit d3b3344b where our custom cvs client would fail to check out a file which lacks a trailing newline from a remote CVS server.
The error triggered by the test without the fix in place is:
CVSProtocolError: Overlong response from CVS server: b'delta with no trailing eolok\n'
Migrated from D6566 (view on Phabricator)