The Lilypond file equivalent to the post

12 Jan 19 -05:32 PM

is

\version "2.18.2"
\header {
      encodingdate = "2019-01-14"
      title = "Paddy Lynn’s Delight"
       subtitle = "Music From Ireland, Volume Three, Bulmer & Sharpley, page 15, tune #43 "}
         \relative c'
          {\key a \dorian \time 4/4
       \repeat volta 2{
             |e8a, a4 c8 b a g |e g g4 a8 g e g |e' a, a4 c8 b a b | c d e d e a a g |
             |e a, a4 c8 b a g |e g g4 a8 g e g |c d e g a g e c | a c b g a2 }
      
       \repeat volta 2{
             |c4 g'8 c, a' c, g' c, | c d e g a e g e |c4 g'8 c, a' c, g' c,| d4 e8 d c a a b |
             |c4 g'8 c, a' c, g' c,| c d e g a e g e | g c, b' a g e d b | a c b g a2 |}
          }

Not that much different in size but some concepts are going to seem weird to ABC users. I also think that ABC might be easier to sight read.