Re: Colons in an anchor name

Looks like a problem. libyaml rejects this on input but produces exactly 
this text on output! Example:

  > echo "population:\n *wi : 5 million\n *il : 10 million" > a
  > cat a
  population:
   *wi : 5 million
   *il : 10 million
  > libyaml-stable/tests/example-reformatter < a > b
  > cat b
  population:
    *wi: 5 million
    *il: 10 million
  > libyaml-stable/tests/example-reformatter < b
  Parser error: while parsing a block mapping at line 1, column 1
  did not find expected key at line 2, column 8

I would recommend altering the definition so that an anchor name follows 
exactly the same rules as an unquoted key.

Jesse Beder wrote:
> The spec currently defines an ns-anchor-name to be any ns-char except [ ] { } ,
> 
> To my eye, though, the following looks like it should be right:
> 
> states:
>   - &wi Wisconsin
>   - &il Illinois
> 
> population:
>   *wi: 5 million
>   *il: 10 million
> 
> But you'd need a space between the alias name and the colon to make it
> match the spec. Why isn't a colon disallowed in anchor names (or at
> least colon+space)?
> 
> Thanks,
> Jesse Beder

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