Add newlines to all test output

MacOS treats them differently, for some reason.

test/asm/nested-brackets.asm

@@ -3,3 +3,4 @@ WRAPPER equs "TRIN"
 	PRINTT "{S{WRAPPER}G}\n"
 
 	PRINTT "{S{WRAPPER}G"
+	PRINTT "\n"

test/asm/nested-brackets.out

@@ -1,2 +1,2 @@
 OK
-OK
+OK

test/asm/opt-b.asm

@@ -1,2 +1,3 @@
 OPT b.X
 PRINTV %..X.X.X.
+PRINTT "\n"

test/asm/opt-b.out

@@ -1 +1 @@
-$2A
+$2A

test/asm/opt-g.asm

@@ -1,2 +1,3 @@
 OPT g.x0X
 PRINTV `.x.x0X0X
+PRINTT "\n"

test/asm/opt-g.out

@@ -1 +1 @@
-$F55
+$F55