more minor doc corrections (patch 1144628)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@32259 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/latex/wx/regex.tex

@@ -114,6 +114,10 @@ size_t count = reEmail.ReplaceAll(text, wxT("HIDDEN@\\2\\3"));
 printf("text now contains %u hidden addresses", count);
 \end{verbatim}
 
+\wxheading{Include files}
+
+<wx/regex.h>
+
 \latexignore{\rtfignore{\wxheading{Members}}}
 
 \membersection{wxRegEx::wxRegEx}\label{wxregexwxregex}