Mosh is licensed under the GPL, which means I would need to make Textastic's source code publicly available which I don't want to do at the moment.

Can you please share the file with me so I can try to reproduce the issue on my device?

Textastic 9.3 adds a new “Line Height” setting that you can use to adjust the spacing between lines (defaults to 110%).

Textastic 9.3 adds the new setting “Indent Based on Syntax”: Automatically indent code when typing, based on its syntax.

For example, increases the indentation when pressing Return after an opening curly brace (“{”) in C or an opening tag in HTML and decreases indentation after a closing curly brace (“}”) or a closing tag.

Textastic 9.3 adds the new keyboard shortcuts “Toggle Comment” (Cmd-/) and “Toggle Block Comment” (Cmd-Option-/).

Textastic 9.3 has the new setting “Close Brackets and Quotes”: Automatically inserts a matching closing character when typing an opening bracket or quote. 

This works for the following character pairs: "", '', (), [], {}.

Thanks you for your report. This is already fixed in the development version and I plan to release it soon. I'm sorry for the inconvenience.

Thanks for letting me know, I'll fix this in the next update.

Here's a problem with the referrer approach you suggested:

When previewing the file "Project Root/Nested Folder/page_1.html", how is the server supposed to know that the project root is "Project Root" and not "Project Root/Nested Folder"? The referrer header in that case is "Project Root/Nested Folder/page_1.html", so that doesn't work.