address comments.

Signed-off-by: doujiang24 <[email protected]>

Author: doujiang24

src/runtime/cgo.go

@@ -81,7 +81,7 @@ func cgoKeepAlive(any) { throw("cgoKeepAlive should not be called") }
 
 // cgoAlwaysFalse is a boolean value that is always false.
 // The cgo-generated code says if cgoAlwaysFalse { cgoUse(p) },
-// or if cgoAlwaysFalse { cgoUse(p) }.
+// or if cgoAlwaysFalse { cgoKeepAlive(p) }.
 // The compiler cannot see that cgoAlwaysFalse is always false,
 // so it emits the test and keeps the call, giving the desired
 // escape/alive analysis result. The test is cheaper than the call.

src/runtime/crash_cgo_test.go

@@ -774,7 +774,7 @@ func TestCgoEscapeWithMultiplePointers(t *testing.T) {
 	got := runTestProg(t, "testprogcgo", "CgoEscapeWithMultiplePointers")
 	want := "OK\n"
 	if got != want {
-		t.Fatalf("want %s, got %s\n", want, got)
+		t.Fatalf("output is %s; want %s", got, want)
 	}
 }