Allow whitespace within function application parentheses

Author: mkantor

src/end-to-end.test.ts

@@ -216,4 +216,12 @@ testCases(endToEnd, code => code)('end-to-end tests', [
       value: 'true',
     }),
   ],
+  [
+    `:integer.add(
+      :integer.subtract(1)(2)
+    )(
+      :integer.subtract(2)(4)
+    )`,
+    either.makeRight('3'),
+  ],
 ])

src/language/parsing/molecule.ts

@@ -90,14 +90,16 @@ const sugaredApply: Parser<PartialMolecule> = parser.map(
     parser.oneOrMore(
       parser.sequence([
         parser.literal('('),
+        optional(omit(whitespace)),
         parser.lazy(() => propertyValue),
+        optional(omit(whitespace)),
         parser.literal(')'),
       ]),
     ),
   ]),
   ([f, multipleArguments]) =>
     multipleArguments.reduce<PartialMolecule>(
-      (expression, [_1, argument, _2]) => ({
+      (expression, [_1, _2, argument, _3, _4]) => ({
         0: '@apply',
         function: expression,
         argument,