Hey bug-gnu-emacs, In Emacs Lisp mode, the last two backslashes in the string "\\[\\]" are highlighted with (font-lock-constant-face font-lock-string-face). Is this expected? Clément. In GNU Emacs 25.1.50.7 (x86_64-pc-linux-gnu, GTK+ Version 3.18.9) of 2016-07-20 built on clem-w50-mint Repository revision: a1a0c208e3e895a6ea0942e8e5c4077faf12c7ad Windowing system distributor 'The X.Org Foundation', version 11.0.11803000 System Description: Linux Mint 18 Sarah