When you put a mistake into some of your comments in subversion repository it's no need to cry. There are simple ways to correct your mistakes. I will show you two most common possibilities.
Configure subversion to allow revision properties changesProperties in svn are unversioned but because by default subversion disallow modification of this, you need to add pre-revprop-change hook script. Here is simple hook script which allow changes of svn:log property and no other (in general your script must return exit status '0' for allowing changes and '1' to disallow). Script should be located in default hook scripts directory - in most distributions in /var/lib/svn/hooks/
(Content of pre-revprop-change script)
if [ "$ACTION" = "M" -a "$PROPNAME" = "svn:log" ]; then
echo "$1 $2 $3 $4 $5" >> /var/lib/svn/logchanges.log
echo "Changing revision properties other than svn:log is prohibited" >&2
svn propset --revprop -r N svn:log "Modified log entry."
property 'svn:log' set on repository revision 'N'
Quick change with svnadmin commandIf you have administration privileges you can simply run:
svnadmin setlog --bypass-hooks REPOS_PATH -r N FILE