[Markdown] Newline in post is a character too late when a code block is used

[KyrneDev]

Current Behavior
The codeblock causes a post to have a horizontal scroll bar on mobile when added as the last part of a line.

Steps to Reproduce

1. Add a code block to a post which ends at the last character in a line (the "`" character is one character past where the new line should be)

Expected Behavior
The code block is moved to a new line

Screenshots

Environment

• Website URL: https://discuss.flarum.org
• Browser: Chrome 71 mobile

Additional Context
You can see the bug here: https://discuss.flarum.org/d/11006-twofactor-by-reflar/34

[franzliedke]

You are talking about the inline .htaccess code in the middle of the post, right?

[KyrneDev]

@franzliedke correct.

[tobyzerner]

I'd say the best thing to do is to remove overflow: auto from .Post-body. Since overflow-wrap was added (flarum/framework@cde5d20), content overflowing shouldn't be a problem.

[davwheat]

Can't reproduce this on beta 13.