Kramdown sometimes emits warnings twice

[gpakosz]

I noticed that sometimes Kramdown emits warnings twice:

$ bundle show kramdown
/usr/local/lib/ruby/gems/2.4.0/gems/kramdown-1.16.2

irb(main):001:0> require 'kramdown'
=> true
irb(main):002:0> s = "This is a [link][with a missing id]"
=> "This is a [link][with a missing id]"
irb(main):003:0> ::Kramdown::Document.new(s).warnings
=> ["No link definition for link ID 'with a missing id' found on line 1", "No link definition for link ID 'with a missing id' found on line 1"]

[gettalong]

The reason for this is that the first warning comes from [link][missing] and the second from [missing]. I don't know if it makes to special case this in the parser.

[gettalong]

I have fixed this - thanks for your report!

[gpakosz]

Thanks Thomas! 👍