Fix at-each-key-value-single-line end positions

[ybiquitous]

Part of #652

See the following example to be reported:

@each $key in map-keys($font-weights) {
/*    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 *    Use @each $key, $value in $map syntax instead of $value: map-get($map, $key)
 */
  $value: map-get($font-weights, $key);
}

[kristerkari]

Thank you 👍