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, 20 insertions, 21 deletions

diff --git a/test/command/5368.md b/test/command/5368.md
index 16cc4352c..e8b54bf7b 100644
--- a/test/command/5368.md
+++ b/test/command/5368.md
@@ -13,27 +13,26 @@
 Quux.
 ^D
 [ OrderedList
-  ( 1, Decimal, Period )
-  [
-    [ Para
-      [ Str "foo" ]
-    , Para
-      [ Image ( "", [], [] ) [ Str "bar" ] ( "bar.png", "fig:" ) ]
+    ( 1 , Decimal , Period )
+    [ [ Para [ Str "foo" ]
+      , Para
+          [ Image
+              ( "" , [] , [] ) [ Str "bar" ] ( "bar.png" , "fig:" )
+          ]
+      ]
+    , [ Para [ Str "foo2" ]
+      , Para
+          [ Image
+              ( "" , [] , [] ) [ Str "bar2" ] ( "bar2.png" , "fig:" )
+          ]
+      ]
+    , [ Para [ Str "foo3" ]
+      , Para
+          [ Image
+              ( "" , [] , [] ) [ Str "foo3" ] ( "foo3.png" , "fig:" )
+          ]
+      ]
     ]
-  ,
-    [ Para
-      [ Str "foo2" ]
-    , Para
-      [ Image ( "", [], [] ) [ Str "bar2" ] ( "bar2.png", "fig:" ) ]
-    ]
-  ,
-    [ Para
-      [ Str "foo3" ]
-    , Para
-      [ Image ( "", [], [] ) [ Str "foo3" ] ( "foo3.png", "fig:" ) ]
-    ]
-  ]
-, Para
-  [ Str "Quux." ]
+, Para [ Str "Quux." ]
 ]
 ```