输入文本与预定义字符串开头不符时标记最后字符，解决代码报错

1. Headings #

Headings use number signs (#), with more signs for smaller hierarchy levels:

Subheading Level 3 #

Subheading Level 4

2. List Items #

• Unordered list item 1
• Unordered list item 2 with emphasized text
  • Nested list item containing inline code
• Unordered list item 3

3. Text Emphasis #

• Italicized text (wrapped in single asterisks)
• Bold text (wrapped in double asterisks)
• Bold and italicized text (wrapped in triple asterisks)

4. Code & Commands #

Inline code snippet: npm install --save

Multi-line code block:

function validateInput(input) {
  if (input.length < 3) {
    return false;
  }
  return true;
}

5. Quoted Text #

Creativity is intelligence having fun.

• Albert Einstein

This is a multi-line blockquote.
It can include formatted elements like italicized phrases or code snippets to add context.

6. Links #

Dashboard Page
User Settings

7. Images #

Company Logo
Product Screenshot

内容的提问来源于stack exchange，提问作者provance