🚀 go-pugleaf

Making an uudecoder I can decode everything but I have problems
with the last fill characters.

For base64 a fillcharacter '=' is defined.

<RFC 1421        Privacy Enhancement for Electronic Mail    February 1993>
    Special processing is performed if fewer than 24 bits are available
    in an input group at the end of a message.  A full encoding quantum
    is always completed at the end of a message.  When fewer than 24
    input bits are available in an input group, zero bits are added (on
    the right) to form an integral number of 6-bit groups.  Output
    character positions which are not required to represent actual input
    data are set to the character "=".
</RFC>

I see no such for uuencode.

What I know until now:
The uuencode algorithm is the same as for base64, only
- the encoding table is different
- an M is added at the beginning of each line.
- the M is not added for the last line(s)

<uuencoded example>
M4$L#!!0``@`(`.AI,C2K1E[3R`8``$",```5````0VAA<G-?57!P97)?,S)X
M,S(N8FUP[9U1DN0T#(8%53SQX"I.P2DHBG=NQB$Y@FX@NBW]DBRGFX%E=JE8
MF9WIWL2)/T^U%/V*[/GM]U__H+G]\OC^^?GF!Z(_'R_?/;Z>V_>/XS_]J-_8
...... // omitted
MS7=O/L29[^,#S47:,<*=_X*P\.61:_(QQ0>\\AE+&BTUW\WY_'-8]1%R0.XS
M:>DI8E`O^8]:B@N^J*^X^+.RY3GWC&%S+4;SW9:/Z"]02P$"%``4``(`"`#H
M:3(TJT9>T\@&``!`C```%0```````````"``````````0VAA<G-?57!P97)?
?,S)X,S(N8FUP4$L%!@`````!``$`0P```/L&````````
`
</uuencoded>

The question is how to decode the end as now my resulting file
is two bytes larger then it should be. I cannot find this
information in a RFC yet.

Hans.