Some .tex tweaks; pngdemo fix.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@1379 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/latex/wx/url.tex

@@ -59,7 +59,7 @@ Returns the last error. This error refers to the URL parsing or to the protocol.
 It can be one of these errors:
 
 \twocolwidtha{7cm}
-\begin{twocollist}\itemsep=0pt
+\begin{twocollist}\itemsep=0pt%
 \twocolitem{{\bf wxURL\_NOERR}}{No error.}
 \twocolitem{{\bf wxURL\_SNTXERR}}{Syntax error in the URL string.}
 \twocolitem{{\bf wxURL\_NOPROTO}}{Found no protocol which can get this URL.}