YAML Ain't Markup Language

Maybe production [170] (simple_char) can be
made less restrictive. For simple strings
that are not part of a map or list, we
could widen it to:

simple_char ::= line_char - ": "
(forgive me this syntax :-) )

That would imply creating two different simple
productions: the current one and the
less restrictive, for leafs.

For example:

[173] simple2 ::= simple_1st simple2_char simple_last
[174] simple2_char ::= line_char - ": "

This requires adjusting other productions. While
this adds some complexity, at the end it will be easier
for the YAML user, as he/she will see less special
characters.

The idea is to match simple strings exactly to their
context in order to give them the widest character range
possible.

By the way, allowing comments after simple leafs would
make " #" a special character sequence. Another restriction.

Regards.
Rolf.