tests/test-pull-http.out

Don't use sed -r; instead use old-style regexp

Rev d895158fe8af introduced some sed -r tests, but -r is only available on GNU
sed, while BSD sed uses -E. Better to use old-style regular expressions, that
way the tests work on all sed variants.

adding a
updating working directory
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
% expect error, cloning not allowed
abort: authorization failed
requesting all changes
% serve errors
% expect error, pulling not allowed
abort: authorization failed
pulling from http://localhost/
searching for changes
% serve errors