Atom style.less that disables Fira Code ligatures on current line, for easier editing. See it in action: http://gfycat.com/LeftRequiredCrownofthornsstarfish

styles.less

/*
 * Your Stylesheet
 *
 * This stylesheet is loaded when Atom starts up and is reloaded automatically
 * when it is changed.
 *
 * If you are unfamiliar with LESS, you can read more about it here:
 * http://www.lesscss.org
 */

// Enable all the Fira Code goodness
atom-text-editor {
  text-rendering: optimizeLegibility;
  -webkit-font-feature-settings: "liga" 1;
  font-feature-settings: "liga" 1;
}

// Disable it for current line with https://github.com/richrace/highlight-line
atom-text-editor::shadow {
  // The cursor line important to use rgba for opacity, also requires !important
  // to override any theme.
  .line.highlight-line {
    // background: rgba(255, 0, 0, 0.3) !important;
      text-rendering: optimizeSpeed;
      -webkit-font-feature-settings:  normal;
      font-feature-settings: normal;
  }

  // Replace 'solid', with 'dashed' or 'dotted' depending of what you have
  // set in the settings page.
  // This is for the bottom line (underline)
  .line.highlight-line-multi-line-solid-bottom {
    border-bottom-color: red;
  }

  // This is for the top line when you have the selection borders enabled.
  .line.highlight-line-multi-line-solid-top {
    border-top-color: red;
  }
}

/*

x == 0
el === document.body
true != false
true !== false
n >= 0
i <= Integer.MAX_INT
A.id <> NULL
true <=> false


x := -1
  ++i
 1..10
 1...9
mask >> 4
cout << "Hola";
  !!object

  // comment
<hr/>
 (-> s vec)
 (->> xs (map inc))
((w) => w.Length)
[X || X <- [1,2,3]]
  <<-

  ::keyword
  #(+ 1 %)
  #_form

 (>>=) :: m a -> (a -> m b) -> m b
 (=<<) :: Monad m => (a -> m b) -> m a -> m b


(>>=) :: (Num a) => a -> a -> a
a /=b ++ a <- c << [1..2] -<<
a == w <- rng -< ()



# Ruby
=~
!~
#{abc}
(. abc)
(.- abc)
<!!
>!!
<!
>!
~@ macro
#'var
#"regexp"
*in*
*out*

*/