block quote shouldn't combine the line even adding the next line

[genepg]

Describe the bug
Block quote should have next line, if adding the empty line.

Setup
Please complete the following information along with version numbers, if applicable.

• OS: macOS
• Shell: zsh
• Terminal Emulator: kitty
• Terminal Multiplexer: no
• Locale: UTF-8

Source Code

> Content Security Policy (CSP) is an added layer of security that helps to detect and mitigate certain types of attacks, including Cross-Site Scripting (XSS) and data injection attacks. These attacks are used for everything from data theft, to site defacement, to malware distribution.
> 
> from MDN

Expected behavior

Content Security Policy (CSP) is an added layer of security that helps to detect and mitigate certain types of attacks, including Cross-Site Scripting (XSS) and data injection attacks. These attacks are used for everything from data theft, to site defacement, to malware distribution.

from MDN

Screenshots

[bashbunni]

Thanks for reporting this! I'm going to migrate the issue to Glamour, our markdown rendering library, so we can track it there.