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Bat
An alternative bundle for Windows cmd and bat files can be found at https://github.com/adamv/windowscmd-tmbundle
Textastic 3.0 doesn't include a syntax definition for R and it's also not in the manual anymore.

But, you can install your own syntax definitions. This is explained in the manual at http://www.textasticapp.com/v3/manual/lessons/How_can_I_add_my_own_syntax_definitions_and_themes.html


A TextMate bundle for R can be downloaded at https://github.com/textmate/r.tmbundle

Why do you want to dismiss it? Just leave it open. It takes away some screen real estate but you can move it where you want it.

But, of course I'll think about your idea.
Can you send me a screenshot and an example file to support@textasticapp.com so I can see the problem?
Actually, it just looks at the previous line when you press enter and inserts the same amount of tabs and spaces in the new line.

I plan to make this more sophisticated in a future version. For example, it should increase the indent level when entering "{" in C code.