ART: Print C1vis lists as [v1,...,vN]

Checker interprets whitespace as a don't-care placeholder, making it
easier to write assertions which test only parts of the output (e.g.
"//CHECK: Add liveness:44" does not test the inputs or any other
attributes apart from "liveness").

However, since the GraphVisualizer prints lists with elements
separated by spaces ("[ v1 ... vN ]"), this allows for false positives
caused by an occurrence elsewhere in the output. For example, the
assertion: "//CHECK: [ x y ]" will match "[ x y ]" but also
"[ x a y b ]" or even "[ x ] abc [ y ]".

Switching to comma-separated lists works around this issue.

This patch updates all test files, fixes one false positive that this
change revealed (test 442, line 337) and two occurrences of a wrong
match (test 462, lines 121, 149).

Bug: 21189305
Change-Id: I3b22503be3d92529dac0b13f66bccbcfabea6721
diff --git a/test/445-checker-licm/src/Main.java b/test/445-checker-licm/src/Main.java
index ce2ab9a..96918d3 100644
--- a/test/445-checker-licm/src/Main.java
+++ b/test/445-checker-licm/src/Main.java
@@ -89,7 +89,7 @@
 
   // CHECK-START: int Main.arrayLength(int[]) licm (before)
   // CHECK-DAG: <<NullCheck:l\d+>> NullCheck loop:{{B\d+}}
-  // CHECK-DAG:                    ArrayLength [ <<NullCheck>> ] loop:{{B\d+}}
+  // CHECK-DAG:                    ArrayLength [<<NullCheck>>] loop:{{B\d+}}
 
   // CHECK-START: int Main.arrayLength(int[]) licm (after)
   // CHECK-NOT:                    NullCheck loop:{{B\d+}}
@@ -97,7 +97,7 @@
 
   // CHECK-START: int Main.arrayLength(int[]) licm (after)
   // CHECK-DAG: <<NullCheck:l\d+>> NullCheck loop:none
-  // CHECK-DAG:                    ArrayLength [ <<NullCheck>> ] loop:none
+  // CHECK-DAG:                    ArrayLength [<<NullCheck>>] loop:none
 
   public static int arrayLength(int[] array) {
     int result = 0;