(non-forced) line breaks are only ignored in TUI

[Zocker1999NET]

Describe the bug
(Non-forced) line breaks are currently only ignored in the TUI, not in the plain output.

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

• OS: NixOS 24.05
• Shell: bash
• Terminal Emulator: Konsole (KDE)
• Terminal Multiplexer: none
• Locale en_US.UTF-8

To Reproduce
Steps to reproduce the behavior:

1. Render the following markdown with glow

Source Code

# My Awesome Title

Hello,
this is a test paragraph
utilizing line breaks to increase "commitability".
But, everything should be rendered without these specific line breaks
as none of them are forced
via `  ` (two spaces) or `\` (backslash)
at the end of the line.

However, this is a new paragraph.\
And this **is** a forced line break.

Expected behavior

• expected a paragraph to be rendered without line breaks (other than forced)
• expected glow output & TUI to behave the same

The expected output for me is how e.g. GitHub renders markdown files in repositories (issues render new lines differently).

Screenshots
From the terminal output:

And from the TUI:

Additional context
That the hard link break is not correctly parsed is already tracked in #461.