solidity-parse's stack assignment now matches slang's

Author: Janther

src/nodes/AssemblyStackAssignment.js

@@ -1,7 +1,12 @@
+import { doc } from 'prettier';
+
+const { hardline } = doc.builders;
+
 export const AssemblyStackAssignment = {
   print: ({ node, path, print }) => [
     path.call(print, 'expression'),
-    ' =: ',
+    hardline,
+    '=: ',
     node.name
   ]
 };