fix(issue#4362) no spacing regression for function (#4363)

* Fixes #4362 which is a regression introduced by an attempt to create improved and generalized function parsing. Set the no spacing flag for comma separated lists and add test.

Author: puckowski

packages/less/src/less/parser/parser.js

@@ -1949,11 +1949,17 @@ const Parser = function Parser(context, imports, fileInfo, currentIndex) {
                     if (e) {
                         features.push(e);
                         if (!parserInput.$char(',')) { break; }
+                        else if (!features[features.length - 1].noSpacing) {
+                            features[features.length - 1].noSpacing = false;
+                        }
                     } else {
                         e = entities.variable() || entities.mixinLookup();
                         if (e) {
                             features.push(e);
                             if (!parserInput.$char(',')) { break; }
+                            else if (!features[features.length - 1].noSpacing) {
+                                features[features.length - 1].noSpacing = false;
+                            }
                         }
                     }
                 } while (e);

packages/less/src/less/tree/nested-at-rule.js

@@ -31,7 +31,7 @@ const NestableAtRulePrototype = {
         for (let index = 0; index < exprValues.length; ++index) {
             expr = exprValues[index];
 
-            if (expr.type === 'Keyword' && index + 1 < exprValues.length) {
+            if (expr.type === 'Keyword' && index + 1 < exprValues.length && (expr.noSpacing || expr.noSpacing == null)) {
                 paren =  exprValues[index + 1];
 
                 if (paren.type ===  'Paren' && paren.noSpacing) {

packages/test-data/css/_main/media.css

@@ -264,3 +264,8 @@
     padding: 0;
   }
 }
+@media print, (max-width: 992px) {
+  div {
+    color: red;
+  }
+}

packages/test-data/less/_main/media.less

@@ -291,3 +291,9 @@
     }
   }
 }
+
+@media print, (max-width: 992px) {
+    div {
+        color: red;
+    }
+}