[Parser] Error in parsing function definition (new parser)

[akshanshbhatt]

$ cat examples/expr2.py
def func(i,):
    pass

$ lpython --show-ast examples/expr2.py --tree  # Old
└-Module
  |-body=↧
  | └-FunctionDef
  |   |-name=func
  |   |-args=
  |   | |-posonlyargs=↧
  |   | |-args=↧
  |   | | └-
  |   | |   |-arg=i
  |   | |   |-annotation=()
  |   | |   └-type_comment=()
  |   | |-vararg=↧
  |   | |-kwonlyargs=↧
  |   | |-kw_defaults=↧
  |   | |-kwarg=↧
  |   | └-defaults=↧
  |   |-body=↧
  |   | └-Pass
  |   |-decorator_list=↧
  |   |-returns=()
  |   └-type_comment=()
  └-type_ignores=↧

$ lpython --show-ast examples/expr2.py --tree --new-parser  # New
tokenizer error: Parenthesis unexpected
 --> examples/expr2.py:1:12
  |
1 | def func(i,):
  |            ^


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context please report it to us (we consider that a bug that needs to be fixed).