all: gofmt -w -s (simplify) tests

And it updates the build tag style on a couple files.

Change-Id: I84478d822c8de3f84b56fa1176c99d2ea5083237
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>

portlist/netstat_test.go

@@ -15,13 +15,13 @@ func TestParsePort(t *testing.T) {
 		expect int
 	}
 	tests := []InOut{
-		InOut{"1.2.3.4:5678", 5678},
-		InOut{"0.0.0.0.999", 999},
-		InOut{"1.2.3.4:*", 0},
-		InOut{"5.5.5.5:0", 0},
-		InOut{"[1::2]:5", 5},
-		InOut{"[1::2].5", 5},
-		InOut{"gibberish", -1},
+		{"1.2.3.4:5678", 5678},
+		{"0.0.0.0.999", 999},
+		{"1.2.3.4:*", 0},
+		{"5.5.5.5:0", 0},
+		{"[1::2]:5", 5},
+		{"[1::2].5", 5},
+		{"gibberish", -1},
 	}
 
 	for _, io := range tests {