emacs-prelude/doc/modules/programming.md

Prelude Programming

Prelude's programming module enables some additional functionality for prog-mode - the parent mode for all major programming modes in Emacs.

Here are some features it provides:

• spell-checking of comments (via flyspell-prog-mode)
• auto-pairing of delimiters like parentheses (via smartparens)
• visual ques for whitespace (via whitespace-mode)
• highlighting code annotations (via hl-todo)
• linter integration (via flycheck)
• showing current definition name in the modeline (via which-func)

Most of this boils down to enabling a bunch of minor modes in prog-mode-hook.