fix(compiler): prevent render of html code in paragraph, fixed #663

Author: QingWei-Li

Diff for: src/core/render/compiler.js

@@ -261,6 +261,8 @@ export class Compiler {
         result = helperTpl('tip', text)
       } else if (/^\?>/.test(text)) {
         result = helperTpl('warn', text)
+      } else if (/^</.test(text)) {
+        return text
       } else {
         result = `<p>${text}</p>`
       }