Subversion是一个版本控制系统，相对于的RCS、CVS，采用了分支管理系统，它的设计目标就是取代CVS。互联网上免费的版本控制服务多基于Subversion。
2012-12-20发布Subversion 1.7.8。上一个版本是2012-10-09的1.7.7
完全改进：
Version 1.7.8 (17 Dec 2012, from /branches/1.7.x) User-visible changes - Client- and server-side bugfixes: * Fix typos in pt_BR, es and zh_TW translations (r1402417, r1402421) - Client-side bugfixes: * fix crash with --username option on Windows (r1396285) * add missing attributes to "svn log -v --xml" output (r1398100) * fix svn patch ignoring hunks after no trailing newline (r139917) * fix hang with ra_serf during error processing (r1403583) * ignore file externals with mergeinfo when merging (r1401915) * fix SEGV with "svnmucc cp rev arg" during argv processing (issue #4079) * fix conflict handling on symlinks (issue #4091) - Server-side bugfixes: * properly detect threading availability (r1398325) * fix "svnadmin load --bypass-prop-validation" (r1237779) * fix parsing of [groupsfoo] sections in authz file (issue #3531) * add Vary: header to GET responses to improve cacheability (r1390653) * fix fs_fs to cleanup after failed rep transmission (r1403964, et al) * fix mod_dav_svn to complain about revisions > HEAD (r1403588) Developer-visible changes: - General: * fix incorrect status returned by 1.6 API (r1403258) * fix compilation with g++ 4.7 (r1345740) * fix svn_uri_get_file_url_from_dirent on Windows (r1409146)下载：