Type attributes can have whitespace before them

By type attributes I mean things like :mut :N :<defaultValue>.
After the colon and before the attribute, whitespace is now
permitted. This makes syntax like

data ro nIntegerArrayInitialized:Int:16:mut:
	<3948 293 293049 948 912
	340 0 2304 0 4785 92>

possible.

parser/type-notation.go

@@ -42,8 +42,13 @@ func (parser *ParsingOperation) parseType () (what Type, err error) {
 
 	for {
 		if !parser.token.Is(lexer.TokenKindColon) { break }
+
+		err = parser.nextToken()
+		if err != nil { return }
+		err = parser.skipWhitespace()
+		if err != nil { return }
 		
-		err = parser.nextToken(
+		err = parser.expect(
 			lexer.TokenKindName,
 			lexer.TokenKindUInt,
 			lexer.TokenKindLParen,

tests/parser/data/main.arf

@@ -41,7 +41,6 @@ data ro lMutIntegerArray16:Int:16:mut
 data ro mExternalData:Int:8
 	external
 
-data ro nIntegerArrayInitialized:Int:16:mut:<
-	3948 293 293049 948 912
-	340 0 2304 0 4785 92
-	>
+data ro nIntegerArrayInitialized:Int:16:mut:
+	<3948 293 293049 948 912
+	340 0 2304 0 4785 92>