John D. Cook has a useful post on using “corner quotes” (⌜ ⌟) to delimit regular expressions in text. As Cook says, it makes a lot of sense especially when the regular expression begins or ends with a space. Cook’s port deals with using Unicode for the corner quotes but it’s also easy to do in Emacs.
In vanilla Emacs, the way to do it is to specify TOP LEFT CORNER and BOTTOM RIGHT CORNER with insert-char through the Ctrl+x 8 binding. If you have Ivy installed, you can also use the lceil and rfloor entities through ivy-insert-org-entity a handy function that I stole from John Kitchin’s Scimax.
(defun ivy-insert-org-entity () “Insert an org-entity using ivy.” (interactive) (ivy-read…