svnadmin setlog — Set the log message on a revision.
Set the log message on
revision REVISION to the
contents of FILE.
This is similar to using svn propset
--revprop to set the svn:log property
on a revision, except that you can also use the option
--bypass-hooks to avoid running any pre-
or post-commit hooks, which is useful if the modification
of revision properties has not been enabled in
the pre-revprop-change hook.
修订版本属性不在版本控制之下的，所以这个命令会永久覆盖前一个日志信息。