Switch from pretty-simple to pretty-show for native output.

Update tests.

Reason:  it turns out that the native output generated by
pretty-simple isn't always readable by the native reader.
According to https://github.com/cdepillabout/pretty-simple/issues/99
it is not a design goal of the library that the rendered values
be readable using 'read'.  This makes it unsuitable for our
purposes.

pretty-show is a bit slower and it uses 4-space indents
(non-configurable), but it doesn't have this serious drawback.

1 files changed, 22 insertions, 14 deletions

diff --git a/test/command/7003.md b/test/command/7003.md
index 4f5e18c70..5f88a58a6 100644
--- a/test/command/7003.md
+++ b/test/command/7003.md
@@ -30,21 +30,29 @@ This a Foo section
 \lstinputlisting{example.tex}
 \end{document}
 ^D
-[ Header 1
-  ( "with-lstlisting-environment", [], [] )
-  [ Str "With", Space, Str "lstlisting", Space, Str "environment" ]
+[ 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" ]
+    ( "" , [] , [] )
+    "\\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}"
+    ( "" , [ "latex" ] , [] )
+    "\\documentclass{article}\n\\begin{document}\n\\section{Bar}\nThis a Bar section\n\\end{document}"
 ]
 ```