svn info provides the "Last Changed Rev:" number which is a better revision number than "Revision:"
Take for example a recent situation in the 3.x interpreter source. The last commit to the interpreter source was 715, but several doc commits were made after that. svn info showed this:
[root@Falcon interpreter.now]# svn info
Repository Root: https://oorexx.svn.sourceforge.net/svnroot/oorexx
Repository UUID: 5c7345e9-2c1c-0410-8966-b4899360e60d
Node Kind: directory
Last Changed Author: wdashley
Last Changed Rev: 715
The revsion level that the interpreter code was at was really 715, but the last commit was 718. 716 - 718 were all commits to the doc portion of the repository, the interpreter code was not changed.
Using Last Changed Revision rather than Revsion will give us a more accurate revision number.