* Add examples to YAMLSyntax; fix minor issues and improve wording
I added proper titles to "Flow Collections" and "Block Scalars", because these
are official YAML Terms, so people can find better help when having issues.
I changed the "ignored newlines" to "folded newlines" because I think ignoring
gives a wrong impression, especially since empty lines (more than one newline)
are not ignored and have a special meaning.
I added an example how to enforce a newline in a folded block scalar.
I fixed the list of characters that are allowed/not allowed in plain and
double quoted scalars.
I added the #yaml channel to the IRC link.
I added links to the YAML Specs. For completeness, I also included YAML 1.2,
although PyYAML and libyaml currently implement 1.1.
* Improve wording
* Add three more characters to forbidden first characters
The existing examples in the "Gotchas" section were rather simple. Expanded upon those to add some additional clarity around how the quoting in YAML works.
