直接在TortoiseSVN中修改过往日志,会提示: DAV request failed;it's possible that the repository's pre-revprop-change hook either failed or is non-existentAt least one property change failed; repository is unchanged. 因为SVN库中的日志本身是没有进行版本管理的,为防止误操作导致原日志信息丢失,所以缺省禁止对其进行修