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src/Pure/System/isabelle_syntax.scala
changeset 43770 88b1b883e8d8
parent 36011 3ff725ac13a4 
--- a/src/Pure/System/isabelle_syntax.scala	Tue Jul 12 11:19:42 2011 +0200
+++ b/src/Pure/System/isabelle_syntax.scala	Tue Jul 12 11:45:13 2011 +0200
@@ -15,8 +15,8 @@
   {
     result.append("\"")
     for (c <- str) {
-      if (c < 32 || c == '\\' || c == '\"') {
-        result.append("\\")
+      if ((c < 32 && c != 5 && c != 6) || c == '\\' || c == '\"') {
+        result.append("\\0")
         if (c < 10) result.append('0')
         if (c < 100) result.append('0')
         result.append(c.asInstanceOf[Int].toString)
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