reraise with FunctionClauseError generates a duplicated message

[eksperimental]

Environment

• Elixir & Erlang/OTP versions (elixir --version): Elixir master and Elixir 1.11.4, OTP 23

Current behavior

iex(2)> try do
...(2)>   raise "oops"
...(2)> rescue
...(2)>   _exception ->
...(2)>     reraise FunctionClauseError, [module: Foo, function: :foo, arity: 2, args: [1, 2]], __STACKTRACE__
...(2)> end
** (FunctionClauseError) no function clause matching in Foo.foo/2

The following arguments were given to Foo.foo/2:

    # 1
    1

    # 2
    2
    
    
    The following arguments were given to Foo.foo/2:
    
        # 1
        1
    
        # 2
        2

Expected behavior

** (FunctionClauseError) no function clause matching in Foo.foo/2

The following arguments were given to Foo.foo/2:

    # 1
    1

    # 2
    2

[josevalim]

This is expected. Not all exceptions are meant to be raised directly. Some of them are raised only by the compiler.