==================
nonary function call
==================

foo = bar()

---

(config_file
  (body
    (attribute
      (identifier)
      (expression
        (expr_term
          (function_call
            (identifier)))))))

==================
unary function call
==================

foo = bar("foo")

---

(config_file 
  (body 
    (attribute 
      (identifier) 
      (expression 
        (expr_term 
          (function_call 
            (identifier) 
            (function_arguments 
              (expression 
                (expr_term 
                  (literal_value 
                    (string_lit))))))))))) 

==================
variadic function call
==================

foo = bar(x...)

---

(config_file 
  (body 
    (attribute 
      (identifier) 
      (expression 
        (expr_term 
          (function_call 
            (identifier) 
            (function_arguments 
              (expression (expr_term (variable_expr (identifier)))) (ellipsis)))))))) 

==================
multiline function call
==================

foo = bar(
  "a",
  "b",
  "c"
)

---

(config_file 
  (body 
    (attribute 
      (identifier) 
      (expression 
        (expr_term 
          (function_call 
            (identifier) 
            (function_arguments 
              (expression (expr_term (literal_value (string_lit)))) 
              (expression (expr_term (literal_value (string_lit)))) 
              (expression (expr_term (literal_value (string_lit)))))))))))