Fix typo in bf1b738b; another line num bug

This affects only mad builds.  The line number after

nullary_keyword_such_as_time
;

was off by one.
toke.c: Remove commented-out code

This ‘if(){’ has been commented out since it was added in 5db068806.
Presumably the intent was to make the special mad code specific to
PL_madskills at some point and have mad builds running without
PL_madskills follow the same code as regular builds (the *s = '\0' and
PL_bufend assignments).

Since then, though, the standard code has changed to match the mad
code.  The next commit will merge them.
toke.c: Merge some mad and sane code

These two code paths are now nearly identical.  However, one uses s as
its cursor; the other uses d therefor while using s to remember the
previous position.  If we switch the uses of d and s, then outside of
PL_madskills we don’t even need to set d.
Long verbatim pod lines in BigFloat.pm
Fix some long lines in BigInt.pm
regen pod issues