improve doc

lib/filter.js

@@ -19,10 +19,10 @@ function cleanSql(sql) {
 
 /**
  * 分割sql
- * @param {String} sqlText 
+ * @param {String} sql 
  */
-function splitSql(sqlText) {
-    return commentFilter.parse(sqlText).lines
+function splitSql(sql) {
+    return commentFilter.parse(sql).lines
 }
 
 exports.filterComments = filterComments;