whilst -> while

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@31267 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

contrib/docs/latex/ogl/sample.tex

@@ -63,7 +63,7 @@ copes with this by treating each arc deletion as a separate command, and
 sending Cut commands recursively, providing an undo path. Undoing such a
 Cut will only undo one command at a time - not a one to one
 correspondence with the original command - but it's a reasonable
-compromise and preserves Do/Undo whilst keeping our DiagramCommand class
+compromise and preserves Do/Undo while keeping our DiagramCommand class
 simple.
 
 \section{Possible enhancements}