Description

Disallow duplicate dollar variables within a stylesheet.

    $a: 1;
    $a: 2;
/** ↑
 * These are duplicates */

Examples

The following patterns are considered violations:

$a: 1;
$a: 2;

$a: 1;
$b: 2;
$a: 3;

$a: 1;
.b {
  $a: 1;
}

The following patterns are not considered violations:

$a: 1;
$b: 2;

$a: 1;
.b {
  $b: 2;
}