Generated by SassMeister.com.

SassMeister-input.scss

// ----
// libsass (v3.2.5)
// ----

$buttons: (
  ('edit', -93px, -184px),
  ('remove', -93px, -207px),
  ('tune', -93px, -314px)
);

@mixin generate-buttons() {
  @each $btn in $buttons {
   .cm-flat-icons .cm-sprite-btn-#{nth($btn, 1)} img,
   .cm-flat-icons .cm-action-icon.cm-action-#{nth($btn, 1)} {
      background-position: nth($btn, 2) nth($btn, 3);
    } 
  }
}

@include generate-buttons()

SassMeister-output.css

.cm-flat-icons .cm-sprite-btn-edit img,
.cm-flat-icons .cm-action-icon.cm-action-edit {
  background-position: -93px -184px;
}

.cm-flat-icons .cm-sprite-btn-remove img,
.cm-flat-icons .cm-action-icon.cm-action-remove {
  background-position: -93px -207px;
}

.cm-flat-icons .cm-sprite-btn-tune img,
.cm-flat-icons .cm-action-icon.cm-action-tune {
  background-position: -93px -314px;
}