fix: add missing argument in function call

[darlanalves]

When using es output format + Typescript, these functions calls cause a compilation error:

error TS2554: Expected 3 arguments, but got 2.

    55       const filler = peg$padEnd("", s.line.toString().length);
                                     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

and

error TS2554: Expected 3 arguments, but got 2.

    61           + filler + " | " + peg$padEnd("", s.column - 1)
                                    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~

[darlanalves]

@Mingun ping

[hildjj]

I think this is mine to fix. Assigning it to myself. Hopefully, I'll be able to pick back up working on peggy in a few days.