Issue 6203 - Fix rule-empty-line-before in stylelint-config-eyeo

stylelint-config-eyeo/index.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-present eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 22 matching lines @@
 
     // Use a space after a property name’s colon
     "declaration-colon-space-after": "always",
 
     // Selectors and declarations should be on their own line
     "selector-list-comma-newline-after": "always",
     "declaration-block-semicolon-newline-after": "always-multi-line",
 
     // Separate rules by an empty line
     "rule-empty-line-before": ["always", {
-      "ignore": ["after-comment", "first-nested"]
+      "ignore": ["after-comment"],
+      "except": ["first-nested"]
     }],
 
     // Use double over single quotation marks
     "string-quotes": "double",
 
     // CSS color values should be specified in hexadecimal where possible
     "color-named": "never",
 
     // Use short hexadecimal notation where possible
     "color-hex-length": "short",
 
     // Don't omit the optional leading 0 for decimal numbers
     "number-leading-zero": "always",
     "number-no-trailing-zeros": true,
 
     // Two spaces per logic level
     "indentation": 2,
 
     // Line length should be 80 characters or less
     "max-line-length": 80,
 
     // Avoid qualifying ID and class names with type selectors
     "selector-no-qualifying-type": [true, {
       "ignore": ["attribute"]
     }]
   }
 };