tools: Fix benchmark tests

The diff format changed.

Change-Id: I13930e0aeb450384d95d71460f9623adb5c1b192
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/78581
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Kokoro: Ben Clayton <bclayton@chromium.org>
Commit-Queue: Ben Clayton <bclayton@chromium.org>

tools/src/bench/bench_test.go

@@ -197,16 +197,20 @@ func TestCompare(t *testing.T) {
 
 	expectEqual(t, "bench.Compare().Format", cmp.Format(bench.DiffFormat{}), "")
 	expectEqual(t, "bench.Compare().Format", "\n"+cmp.Format(bench.DiffFormat{TimeA: true}), `
++-----------+
 | A         |
-|-----------|
++-----------+
 | 1.67681ms |
 | 53.15µs   |
++-----------+
 `)
 	expectEqual(t, "bench.Compare().Format", "\n"+cmp.Format(bench.DiffFormat{TimeA: true, TimeB: true}), `
++-----------+-------------+
 | A         | B           |
-|-----------+-------------|
++-----------+-------------+
 | 1.67681ms | 87.657868ms |
 | 53.15µs   | 2.352336ms  |
++-----------+-------------+
 `)
 	expectEqual(t, "bench.Compare().Format", "\n"+cmp.Format(bench.DiffFormat{
 		TestName:        true,
@@ -215,10 +219,12 @@ func TestCompare(t *testing.T) {
 		TimeA:           true,
 		TimeB:           true,
 	}), `
++--------------+-------------+-----------+-----------+-------------+
 | Test name    | Δ (A → B)   | % (A → B) | A         | B           |
-|--------------+-------------+-----------+-----------+-------------|
++--------------+-------------+-----------+-----------+-------------+
 | MyBenchmark3 | 85.981058ms | +5127.7%  | 1.67681ms | 87.657868ms |
 | MyBenchmark4 | 2.299186ms  | +4325.8%  | 53.15µs   | 2.352336ms  |
++--------------+-------------+-----------+-----------+-------------+
 `)
 	expectEqual(t, "bench.Compare().Format", "\n"+cmp.Format(bench.DiffFormat{
 		TestName:           true,
@@ -230,10 +236,12 @@ func TestCompare(t *testing.T) {
 		TimeA:              true,
 		TimeB:              true,
 	}), `
++--------------+-------------+-----------+-----------+-----------+-----------+-----------+-------------+
 | Test name    | Δ (A → B)   | % (A → B) | % (B → A) | × (A → B) | × (B → A) | A         | B           |
-|--------------+-------------+-----------+-----------+-----------+-----------+-----------+-------------|
++--------------+-------------+-----------+-----------+-----------+-----------+-----------+-------------+
 | MyBenchmark3 | 85.981058ms | +5127.7%  | -98.1%    | +52.2766  | +0.0191   | 1.67681ms | 87.657868ms |
 | MyBenchmark4 | 2.299186ms  | +4325.8%  | -97.7%    | +44.2584  | +0.0226   | 53.15µs   | 2.352336ms  |
++--------------+-------------+-----------+-----------+-----------+-----------+-----------+-------------+
 `)
 }