Example fix (eatonphil#5)

* fix example

* remove redundant type conversation

cmd/libraryexample/main.go

@@ -1,7 +1,6 @@
 package main
 
 import (
-	"bytes"
 	"fmt"
 
 	"github.com/eatonphil/gosql"
@@ -10,9 +9,7 @@ import (
 func main() {
 	mb := gosql.NewMemoryBackend()
 
-	source := bytes.NewBufferString("CREATE TABLE users (id INT, name TEXT); INSERT INTO users VALUES (1, 'Admin'); SELECT id, name FROM users")
-
-	ast, err := gosql.Parse(source)
+	ast, err := gosql.Parse("CREATE TABLE users (id INT, name TEXT); INSERT INTO users VALUES (1, 'Admin'); SELECT id, name FROM users")
 	if err != nil {
 		panic(err)
 	}

lexer.go

@@ -121,7 +121,7 @@ func longestMatch(source string, ic cursor, options []string) string {
 			if option == string(value) {
 				skipList = append(skipList, i)
 				if len(option) > len(match) {
-					match = string(option)
+					match = option
 				}
 
 				continue

memory.go

@@ -53,7 +53,7 @@ func literalToMemoryCell(t *token) MemoryCell {
 			fmt.Printf("Corrupted data [%s]: %s\n", string(buf.Bytes()), err)
 			return MemoryCell(nil)
 		}
-		return MemoryCell(buf.Bytes())
+		return buf.Bytes()
 	}
 
 	if t.kind == stringKind {
@@ -62,7 +62,7 @@ func literalToMemoryCell(t *token) MemoryCell {
 
 	if t.kind == boolKind {
 		if t.value == "true" {
-			return MemoryCell([]byte{1})
+			return []byte{1}
 		} else {
 			return MemoryCell(nil)
 		}