Use StringBuilder instead of StringBuffer to create SPACE string.
--- flute-1.1.6.orig/source/org/w3c/flute/parser/Parser.jj
+++ flute-1.1.6/source/org/w3c/flute/parser/Parser.jj
@@ -52,7 +52,7 @@ import org.w3c.flute.util.Encoding;
 public class Parser implements org.w3c.css.sac.Parser {
 
     // replaces all \t, \n, etc with this StringBuffer.
-    static final StringBuffer SPACE = new StringBuffer(" ");
+    static final StringBuilder SPACE = new StringBuilder(" ");
 
     // the document handler for the parser
     protected DocumentHandler documentHandler;