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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def do_diff(self, subcmd, opts, *args):
 """Display the differences between two paths. usage: 2. diff [-r N[:M]] --old=OLD-TGT[@OLDREV] [--new=NEW-TGT[@NEWREV]] \ 3. diff OLD-URL[@OLDREV] NEW-URL[@NEWREV] 1. Display the changes made to TARGETs as they are seen in REV between two revisions. TARGETs may be working copy paths or URLs. N defaults to BASE if any TARGET is a working copy path, otherwise it must be specified. M defaults to the current working version if any TARGET is a working copy path, otherwise it defaults to HEAD. 2. Display the differences between OLD-TGT as it was seen in OLDREV and NEW-TGT as it was seen in NEWREV. PATHs, if given, are relative to OLD-TGT and NEW-TGT and restrict the output to differences for those paths. OLD-TGT and NEW-TGT may be working copy paths or URL[@REV]. NEW-TGT defaults to OLD-TGT if not specified. -r N makes OLDREV default to N, -r N:M makes OLDREV default to N and NEWREV default to M. 3. Shorthand for 'svn diff --old=OLD-URL[@OLDREV] --new=NEW-URL[@NEWREV]' Use just 'svn diff' to display local modifications in a working copy. ${cmd_option_list} """

        print "'svn %s' opts: %s" % (subcmd, opts)
        print "'svn %s' args: %s" % (subcmd, args)