pretty-print should place keyword and keyword value on same line.

[Alan Post]

The following program:

(use extras)
(set! foo `(foo bar: bar baz: baz qux: qux))
(pretty-print `(,@foo ,@foo ,@foo))
(exit)

Produces the following output:

(foo bar:
     bar
     baz:
     baz
     qux:
     qux
     foo
     bar:
     bar
     baz:
     baz
     qux:
     qux
     foo
     bar:
     bar
     baz:
     baz
     qux:
     qux)

I think the output should instead be:

(foo bar: bar
     baz: baz
     qux: qux
     foo 
     bar: bar
     baz: baz
     qux: qux
     foo
     bar: bar
     baz: baz
     qux: qux)

That is, the keyword and it's argument should be on the same line.

This is a stylistic issue, but I hope I'm not the only who thinks pretty-print would look prettier in the second format.

[felix winkelmann]

See the comment I added to #489. The same applies here.