Add more tests for RGBASM coverage

test/asm/state-features.out

@@ -0,0 +1,19 @@
+; File generated by rgbasm
+
+; Numeric constants
+def constant equ $6
+
+; Variables
+def variable = $5
+
+; String constants
+def string equs "four"
+
+; Character maps
+newcharmap main
+charmap "char", $2, $3
+
+; Macros
+macro one
+!@#$%^&* /* anything */ :'<,>./? ; goes!
+endm