The tab key in BBEdit inserts a literal tab character, or advances to a tab stop. It doesn't indent the line, which is what I would argue it should do when writing code.
When this option is on, you can press the Tab key to invoke the Shift Right command, or Shift-Tab to invoke the Shift Left command; this may be useful for those accustomed to Windows editing key behavior. When this option is off, pressing Tab will insert a tab character in the normal manner. This option is off by default.
I think this is already identical to tab behaviour in Emacs, just not by default.
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The tab key in BBEdit inserts a literal tab character, or advances to a tab stop. It doesn't indent the line, which is what I would argue it should do when writing code.
As a matter of interest, there is a setting `Allow tab key to indent text blocks` (in Settings > Keyboard) – doesn't that do what you're describing?
Per the manual:
I think this is already identical to tab behaviour in Emacs, just not by default.
TIL! Thank you!