Enable single_line_comment_spacing

[paulbalandan]

Description

$ vendor/bin/php-cs-fixer describe single_line_comment_spacing
Description of single_line_comment_spacing rule.
Single-line comments must have proper spacing.

Fixing examples:
 * Example #1.
   ---------- begin diff ----------
   --- Original
   +++ New
   @@ -1,4 +1,4 @@
    <?php
   -//comment 1
   -#comment 2
   -/*comment 3*/
   +// comment 1
   +# comment 2
   +/* comment 3 */

   ----------- end diff ----------

Checklist:

• Securely signed commits
• Component(s) with PHPDoc blocks, only if necessary or adds value
• Unit testing, with >80% coverage
• User guide updated
• Conforms to style guide