http://svnbook.red-bean.com/nightly/en/svn-book.html#svn.advanced.externaldifftools.merge,
Example 7.6 "mergewrap.py" shows the argument order as
# Get the paths provided by Subversion.
BASE = sys.argv[1]
MINE = sys.argv[2]
THEIRS = sys.argv[3]
MERGED = sys.argv[4]
WCPATH = sys.argv[5]
Example 7.7. mergewrap.bat shows the same order as Example 7.6.
However, the routine svn_cl__merge_file_externally in svn/util.c,
1.6.17, uses a different order ( the mine and their arguments are
switched ):
arguments[0] = merge_tool;
arguments[1] = base_path;
arguments[2] = their_path;
arguments[3] = my_path;
arguments[4] = merged_path;
arguments[5] = wc_path;
arguments[6] = NULL;
the current version, r1140729, shows the same order in util.c as 1.6.17.
** <http://svn.apache.org/viewvc?view=revision&revision=1140729>
