document "wrap" attribute for wxStaticText

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@52408 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/tech/tn0014.txt

@@ -455,6 +455,14 @@ splitter is created split, either horizontally or vertically depending
 on the value of "orientation" attribute.
 
 
+wxStaticText
+------------
+
+wxStaticText supports one class-specific attribute which wraps the controls
+contents at the specified boundary:
+
+wrap                       Integer, in pixels     None
+
 wxStatusBar
 -----------
 fields                     Integer number of fields