Find and replace XXX. replaces XXX\.

When using basic find and replace for example

EditorSearchOptions options = new EditorSearchOptions();
options.FindText = find;
options.ReplaceText = replace;
options.PatternProvider = SearchPatternProviders.Normal;

options.Scope = EditorSearchScope.Document;
options.MatchWholeWord = true;

and find = XXX. 20
and replace = XXX. 30

The replace result becomes XXX\. 30

which to me is odd
is there some syntax causing this it should be XXX. 30

or is it a strange bug


Steve