Merge pull request #2400 from SomMeri/nested-parent-selector-2026-v1

Nested parent selectors &:not(&)  - 2026

Author: lukeapage

lib/less/parser/parser.js

@@ -867,7 +867,8 @@ var Parser = function Parser(context, imports, fileInfo) {
                 e = parserInput.$re(/^(?:\d+\.\d+|\d+)%/) ||
                     parserInput.$re(/^(?:[.#]?|:*)(?:[\w-]|[^\x00-\x9f]|\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/) ||
                     parserInput.$char('*') || parserInput.$char('&') || this.attribute() ||
-                    parserInput.$re(/^\([^()@]+\)/) || parserInput.$re(/^[\.#:](?=@)/) || this.entities.variableCurly();
+                    parserInput.$re(/^\([^&()@]+\)/) ||  parserInput.$re(/^[\.#:](?=@)/) ||
+                    this.entities.variableCurly();
 
                 if (! e) {
                     parserInput.save();