there is no attribute "placeholder"

[Pierre Rudloff]

WebSVN claims in the footer to use valid XHTML, but the W3C validator reports one error :
Line 61, Column 176: there is no attribute "placeholder"
…text" size="5" name="rev" placeholder="HEAD" /><span class="submit"><input typ…
(I guess the attribute only exists in HTML5.)

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: websvn 2.3.3-1
ProcVersionSignature: Ubuntu 3.2.0-29.46-generic 3.2.24
Uname: Linux 3.2.0-29-generic x86_64
ApportVersion: 2.0.1-0ubuntu12
Architecture: amd64
Date: Thu Aug 23 11:56:21 2012
InstallationMedia: Ubuntu-Server 12.04 LTS "Precise Pangolin" - Release amd64 (20120424.1)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: websvn
UpgradeStatus: No upgrade log present (probably fresh install)