Fix some tests and do some cleanup.

test/multiple_semicolons_everywhere.inx

@@ -0,0 +1,14 @@
+vertex main :: (pos : float3 @position) -> float3 @position {
+	return pos;;;
+}
+
+foo :: () -> float4 {
+	return float4(1.0, 1.0, 1.0, 1.0);;;
+}
+
+pixel main :: () -> float4 @target0 {
+	y : float4 = foo();;;;
+	;;
+	color : float4 = y;
+	return color;
+}