如何仅移除以特定字符串开头的重复行？

Hey there! Let's walk through exactly how to format content using Markdown, with clear, actionable examples for each rule you outlined:

• Headings: Use number signs (#) at the start of a line. The number of #s dictates the heading level—more signs mean a smaller heading:

  • Input: # Main Heading
  • Output: # Main Heading
  • Input: ## Subheading
  • Output: ## Subheading

• List Items: Start each line with a dash (-). For nested lists, just indent the dashes one level:

  • First top-level list item
  • Second top-level list item
    • Nested list item
    • Another nested item

• Emphasized Text: Wrap the text you want to highlight with single asterisks (*) to make it italicized:

  • Input: *This text is emphasized*
  • Output: This text is emphasized

• Code or Commands: Surround inline code with single backticks (`). For longer code blocks, use three backticks (```) on lines before and after the code:

  • Inline example: git commit -m "Fix bug"
  • Multi-line example input:

    def calculate_sum(a, b):
        return a + b
    

  • Multi-line example output:

    def calculate_sum(a, b):
        return a + b
    

• Quoted Text: Prepend each line of the quote with a greater-than sign (>):

  • Input: > This is a quoted message.
  • Output:

  This is a quoted message.

• Links: Put the text you want to display in square brackets ([]), then add the target URL right after in parentheses (()):

  • Input: [Your Display Text](https://your-target-url.com)
  • Output: Your Display Text

• Images: Similar to links, but start with an exclamation mark (!). The square brackets hold alt text (for accessibility or if the image fails to load), and the parentheses contain the image's URL:

  • Input: ![Alt Text for Image](https://your-image-url.com/image.jpg)
  • Output:

内容的提问来源于stack exchange，提问作者CandyGum