Adds a test for identifiers that contain $.

Author: nrfulton

corpus/definitions.txt

@@ -351,6 +351,30 @@ class A {
         (identifier)
         (type_identifier)))))
 
+=======================================
+$ in identifier names
+=======================================
+
+class $A$B$ {
+  val b$, c$ : Int
+  val d$ : String
+}
+
+---
+
+(compilation_unit
+  (class_definition
+    (identifier)
+    (template_body
+      (val_declaration
+        (identifier)
+        (identifier)
+        (type_identifier))
+      (val_declaration
+        (identifier)
+        (type_identifier)))))
+
+
 =======================================
 Value declarations (Scala 3 syntax)
 =======================================