Pre-formatted text wrapping change in technical debug page.

In (typically rare) cases, a very long exception line can appear that
requires horiztonal scrolling in the cut-and-paste exception layout box.
To make this fractionally more readable, we pre-wrap the text now.

Fixes django#16331, based on a patch from Trinh Hai-Anh.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@16637 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/views/debug.py

@@ -446,7 +446,7 @@ def empty_urlconf(request):
     h2 span { font-size:80%; color:#666; font-weight:normal; }
     h3 { margin:1em 0 .5em 0; }
     h4 { margin:0 0 .5em 0; font-weight: normal; }
-    code, pre { font-size: 100%; }
+    code, pre { font-size: 100%; white-space: pre-wrap; }
     table { border:1px solid #ccc; border-collapse: collapse; width:100%; background:white; }
     tbody td, tbody th { vertical-align:top; padding:2px 3px; }
     thead th { padding:1px 6px 1px 3px; background:#fefefe; text-align:left; font-weight:normal; font-size:11px; border:1px solid #ddd; }