removing unnecessary join

Author: Janther

src/nodes/AssemblyAssignment.js

@@ -5,12 +5,11 @@ const {
 } = require('prettier');
 
 const AssemblyAssignment = {
-  print: ({ path, print }) =>
-    join(' ', [
-      join(', ', path.map(print, 'names')),
-      ':=',
-      path.call(print, 'expression')
-    ])
+  print: ({ path, print }) => [
+    join(', ', path.map(print, 'names')),
+    ' := ',
+    path.call(print, 'expression')
+  ]
 };
 
 module.exports = AssemblyAssignment;