gitweb: fix file page display problem on IE (6.0)

Bad support of "white-space: pre" property.

templates/map-gitweb

@@ -19,7 +19,7 b' manifestfileentry = \'<tr class="parity#p'
 filerevision = filerevision-gitweb.tmpl
 fileannotate = fileannotate-gitweb.tmpl
 filelog = filelog-gitweb.tmpl
-fileline = '<div style="font-family:monospace; white-space: pre;" class="parity#parity#"><span class="linenr">   #linenumber#</span> #line|escape#</div>'
+fileline = '<div style="font-family:monospace" class="parity#parity#"><pre><span class="linenr">   #linenumber#</span> #line|escape#</pre></div>'
 annotateline = '<tr style="font-family:monospace; white-space: pre;" class="parity#parity#"><td class="linenr" style="text-align: right;"><a href="?cs=#node|short#;style=gitweb">#author|obfuscate#@#rev#</a></td><td>#line|escape#</td></tr>'
 difflineplus = '<div style="color:#008800;">#line|escape#</div>'
 difflineminus = '<div style="color:#cc0000;">#line|escape#</div>'