bug 127091 - big string cleanup, removing old APIs

- removing Assign/AppendWithConversion for single-characters
- removing unused StripChars
- removing ReplaceChar[s] for non-matching chars
- removing CompressSet
- removing nsCString::Find/FindCharInSet/RFind for unichar strings
- removing lots of EqualsWithConversion
r=dp, sr=jag
a=asa


git-svn-id: svn://10.0.0.236/trunk@115750 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/content/xml/document/src/nsFIXptr.cpp

@@ -188,7 +188,7 @@ static nsresult GetRange(
 {
   nsresult rv = NS_OK;
   nsCOMPtr<nsIDOMNode> node;
-  if (nsString::IsAlpha(aExpression.First())) {
+  if (nsCRT::IsAsciiAlpha(aExpression.First())) {
     // name
     nsAutoString id;
     const nsAutoString expression(aExpression);