Lexer unit test now prints out resulting error

lexer/lexer.go

@@ -13,7 +13,7 @@ type LexingOperation struct {
 // Tokenize converts a file into a slice of tokens (lexemes).
 func Tokenize (file *file.File) (tokens []Token, err error) {
 	lexer := LexingOperation { file: file }
-	err = lexer.tokenize()
+	err    = lexer.tokenize()
 	tokens = lexer.tokens
 
 	// if the lexing operation returned io.EOF, nothing went wrong so we

lexer/lexer_test.go

@@ -13,6 +13,8 @@ func TestTokenizeAll (test *testing.T) {
 	}
 	
 	tokens, err := Tokenize(file)
+	test.Log("resulting error:")
+	test.Log(err.Error())
 	if err == nil {
 		test.Log("Tokenize() should have returned an error")
 		test.Fail()