How can you list all subversion merges?
For example:
Trunk ____9_____14____20___
\\ \\ \\
\\______\\_____\\____
Branch01
You can use the svn plist command for this...
svn plist -v svn:mergeinfo URL/branches/Branch01
will print out the information about the branch
an other way is to use the --use-merge-history
svn log -v --use-merge-history URL/branches/Branch01
EDIT: The following seemed to me what you are searching for.
svn mergeinfo URL/trunk URL/branches/Branch01 --show-revs merged