When we diminish a mode, we are saying we want it to continue doing its work for us, but we no longer want to be reminded of it. It becomes a night worker, like a janitor; it becomes an invisible man; it remains a component, perhaps an important one, sometimes an indispensable one, of the mechanism that maintains the day-people's world, but its place in their thoughts is diminished, usually to nothing. As we grow old we diminish more and more such thoughts, such people, usually to nothing. -- Will Mengarini
This package implements hiding or abbreviation of the mode line displays (lighters) of minor-modes.
(require 'diminish) ;; Hide jiggle-mode lighter from mode line (diminish 'jiggle-mode) ;; Replace abbrev-mode lighter with "Abv" (diminish 'abbrev-mode "Abv")
John Wiegley's use-package macro also has support for diminish.el.
diminish.el was created by Will Mengarini on 19th of February 1998 and is now maintained by Martin Yrjölä.