test/codegen: fix a tab in comparisons.go to ensure pattern works

Fix a pattern in test/codegen/comparisons.go to use whitespace instead
of a tab. The test needs a whitespace to properly fail if the regalloc
change from CL686655 would be missing (in that case we would have a
spill immediately after call to memequal, which is supposed to be
captured by this pattern).

Change-Id: I5b6fb5e861b9327c7f071660592b8ffa265e0030
Reviewed-on: https://go-review.googlesource.com/c/go/+/727620
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/test/codegen/comparisons.go b/test/codegen/comparisons.go
index bcce21e404..0b550adc05 100644
--- a/test/codegen/comparisons.go
+++ b/test/codegen/comparisons.go
@@ -660,13 +660,13 @@ func equalVarString8(a string) bool {
 	return a[:8] == b
 }
 
-func equalVarStringNoSpill(a,b string) bool {
+func equalVarStringNoSpill(a, b string) bool {
 	s := string("ZZZZZZZZZ")
 	// arm64:".*memequal"
 	memeq1 := a[:9] == s
 	// arm64:-".*"
 	memeq2 := s == a[:9]
-	// arm64:-"MOVB\tR0,.*SP",".*memequal"
+	// arm64:-"MOVB R0,.*SP",".*memequal"
 	memeq3 := s == b[:9]
 	return memeq1 && memeq2 && memeq3
 }