Update test.dart for detection output of machine formatted errors

compiler/java/com/google/dart/compiler/PrettyErrorFormatter.java

Index: compiler/java/com/google/dart/compiler/PrettyErrorFormatter.java
diff --git a/compiler/java/com/google/dart/compiler/PrettyErrorFormatter.java b/compiler/java/com/google/dart/compiler/PrettyErrorFormatter.java
index f8ac492f35abbe98ae49f486d2b6f5f70df25eae..21d6c21d0ace52c570fa4b58fe16c4fbb375d188 100644
--- a/compiler/java/com/google/dart/compiler/PrettyErrorFormatter.java
+++ b/compiler/java/com/google/dart/compiler/PrettyErrorFormatter.java
@@ -87,15 +87,15 @@ public class PrettyErrorFormatter extends DefaultErrorFormatter {
       }
       if (errorFormat == ErrorFormat.MACHINE) {
         buf.append(String.format(
-            "%s:%s:%s:%s:%d:%d:%d: %s",
-            event.getErrorCode().getErrorSeverity(),
-            event.getErrorCode().getSubSystem(),
-            event.getErrorCode(),
-            sourceFile.getName(),
+            "%s|%s|%s|%s|%d|%d|%d|%s",
+            escapePipe(event.getErrorCode().getErrorSeverity().toString()),
+            escapePipe(event.getErrorCode().getSubSystem().toString()),
+            escapePipe(event.getErrorCode().toString()),
+            escapePipe(sourceFile.getName()),
             event.getLineNumber(),
             1 + col,
             length,
-            event.getMessage()));
+            escapePipe(event.getMessage())));
       } else {
         String sourceName = sourceFile.getUri().toString();
         String includeFrom = getImportString(sourceFile);
@@ -154,6 +154,17 @@ public class PrettyErrorFormatter extends DefaultErrorFormatter {
     }
   }
 
+  private String escapePipe(String input) {
+    StringBuilder result = new StringBuilder();
+    for (char c : input.toCharArray()) {
+      if (c == '\\' || c == '|') {
+        result.append('\\');
+      }
+      result.append(c);
+    }
+    return result.toString();
+  }
+
   private String getLineAt(BufferedReader reader, int line) throws IOException {
     if (line <= 0) {
       return null;