Well-formatted composed statements

[juanca]

Good

composes: foo from ./file/foo.css;
composes: foo bar from ./file/foo.css;
composes: 
  foo
  bar 
  from ./file/foo.css;

Bad

composes: foo    from ./file/foo.css;
composes:     foo  bar   from ./file/foo.css;
composes: 
  foo
  bar baz
  from ./file/foo.css;

[juanca]

I guess this is another rule instead of a bugfix. I'll punt this until a more pressing need or a time with more data on its demand.