Use pretty-simple to format native output.

Previously we used our own homespun formatting.  But this
produces over-long lines that aren't ideal for diffs in tests.
Easier to use something off-the-shelf and standard.

Closes #7580.

Performance is slower by about a factor of 10, but this isn't
really a problem because native isn't suitable as a serialization
format. (For serialization you should use json, because the reader
is so much faster than native.)

1 files changed, 17 insertions, 4 deletions

diff --git a/test/command/7003.md b/test/command/7003.md
index 1f6275943..4f5e18c70 100644
--- a/test/command/7003.md
+++ b/test/command/7003.md
@@ -30,8 +30,21 @@ This a Foo section
 \lstinputlisting{example.tex}
 \end{document}
 ^D
-[Header 1 ("with-lstlisting-environment",[],[]) [Str "With",Space,Str "lstlisting",Space,Str "environment"]
-,CodeBlock ("",[],[]) "\\documentclass{article}\n\\begin{document}\n\\section{Foo}\nThis a Foo section\n\\end{document}"
-,Header 1 ("with-lstinputlisting-command",[],[]) [Str "With",Space,Str "lstinputlisting",Space,Str "command"]
-,CodeBlock ("",["latex"],[]) "\\documentclass{article}\n\\begin{document}\n\\section{Bar}\nThis a Bar section\n\\end{document}"]
+[ Header 1
+  ( "with-lstlisting-environment", [], [] )
+  [ Str "With", Space, Str "lstlisting", Space, Str "environment" ]
+, CodeBlock
+  ( ""
+  , []
+  , []
+  ) "\\documentclass{article}\n\\begin{document}\n\\section{Foo}\nThis a Foo section\n\\end{document}"
+, Header 1
+  ( "with-lstinputlisting-command", [], [] )
+  [ Str "With", Space, Str "lstinputlisting", Space, Str "command" ]
+, CodeBlock
+  ( ""
+  , [ "latex" ]
+  , []
+  ) "\\documentclass{article}\n\\begin{document}\n\\section{Bar}\nThis a Bar section\n\\end{document}"
+]
 ```