Further clarify a docstring.  No functional change.
* subversion/tests/cmdline/externals_tests.py
(externals_test_setup): Use more specific metasyntactic variables.
Correct a syntax error in the non-relative URLs.
@@ -73,15 +73,15 @@ def externals_test_setup(sbox):
Properties on 'A/C':
svn:externals
- exdir_G <scheme>:///<other_repos>/A/D/G
+ exdir_G <scheme>://<...>/<other_repos_basename>/A/D/G
../../../<other_repos_basename>/A/D/H@1 exdir_H
Properties on 'A/D':
svn:externals
^/../<other_repos_basename>/A exdir_A
- //<other_repos>/A/D/G/ exdir_A/G/
- exdir_A/H -r 1 <scheme>:///<other_repos>/A/D/H
- /<some_paths>/A/B x/y/z/blah
+ //<scheme-relative URI to other_repos>/A/D/G/ exdir_A/G/
+ exdir_A/H -r 1 <scheme>://<...>/<other_repos_basename>/A/D/H
+ /<root-relative URI to other_repos>/A/B x/y/z/blah
A dictionary is returned keyed by the directory created by the
external whose value is the URL of the external.
