Cleanup

lex.go

diff --git a/lex.go b/lex.go
index ad66717..45b963c 100644
--- a/lex.go
+++ b/lex.go
@@ -12,10 +12,8 @@
 
 import (
 	"fmt"
-	// "log"
-	"strings"
-	// "unicode"
 	"strconv"
+	"strings"
 	"unicode/utf8"
 )
 
@@ -181,7 +179,6 @@
 }
 
 // state functions
-// TODO: handle comments
 
 // lexBeforeKey scans until a key begins.
 func lexBeforeKey(l *lexer) stateFn {