added lox test files

lox.t/scanning/identifiers.lox

@@ -0,0 +1,12 @@
+andy formless fo _ _123 _abc ab123
+abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890_
+
+// expect: IDENTIFIER andy null
+// expect: IDENTIFIER formless null
+// expect: IDENTIFIER fo null
+// expect: IDENTIFIER _ null
+// expect: IDENTIFIER _123 null
+// expect: IDENTIFIER _abc null
+// expect: IDENTIFIER ab123 null
+// expect: IDENTIFIER abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890_ null
+// expect: EOF  null

lox.t/scanning/keywords.lox

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+and class else false for fun if nil or return super this true var while
+
+// expect: AND and null
+// expect: CLASS class null
+// expect: ELSE else null
+// expect: FALSE false null
+// expect: FOR for null
+// expect: FUN fun null
+// expect: IF if null
+// expect: NIL nil null
+// expect: OR or null
+// expect: RETURN return null
+// expect: SUPER super null
+// expect: THIS this null
+// expect: TRUE true null
+// expect: VAR var null
+// expect: WHILE while null
+// expect: EOF  null

lox.t/scanning/numbers.lox

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+123
+123.456
+.456
+123.
+
+// expect: NUMBER 123 123.0
+// expect: NUMBER 123.456 123.456
+// expect: DOT . null
+// expect: NUMBER 456 456.0
+// expect: NUMBER 123 123.0
+// expect: DOT . null
+// expect: EOF  null

lox.t/scanning/punctuators.lox

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+(){};,+-*!===<=>=!=<>/.
+
+// expect: LEFT_PAREN ( null
+// expect: RIGHT_PAREN ) null
+// expect: LEFT_BRACE { null
+// expect: RIGHT_BRACE } null
+// expect: SEMICOLON ; null
+// expect: COMMA , null
+// expect: PLUS + null
+// expect: MINUS - null
+// expect: STAR * null
+// expect: BANG_EQUAL != null
+// expect: EQUAL_EQUAL == null
+// expect: LESS_EQUAL <= null
+// expect: GREATER_EQUAL >= null
+// expect: BANG_EQUAL != null
+// expect: LESS < null
+// expect: GREATER > null
+// expect: SLASH / null
+// expect: DOT . null
+// expect: EOF  null

lox.t/scanning/strings.lox

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+""
+"string"
+
+// expect: STRING "" 
+// expect: STRING "string" string
+// expect: EOF  null

lox.t/scanning/whitespace.lox

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+space    tabs				newlines
+
+
+
+
+end
+
+// expect: IDENTIFIER space null
+// expect: IDENTIFIER tabs null
+// expect: IDENTIFIER newlines null
+// expect: IDENTIFIER end null
+// expect: EOF  null