Revision 1905509

On the 'pristines-on-demand-on-mwf' branch: Update basic_tests.py#8 so that
it would work in both pristine modes.

The test performs direct manipulations on the pristine file.  But with
--store-pristine=no, we don't have that file available on disk, so let's
fix that by running `svn diff` for the modified file, as that will fetch
the required pristine.

* subversion/tests/cmdline/basic_tests.py
  (basic_commit_corruption): Remove Wimp() marker.  Call `svn diff` for
   the modified file to have its pristine available locally.