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, 48 insertions, 46 deletions

diff --git a/test/command/3530.md b/test/command/3530.md
index 525c691f8..168cb7067 100644
--- a/test/command/3530.md
+++ b/test/command/3530.md
@@ -3,52 +3,54 @@
 \subfile{command/sub-file-chapter-1}
 \subfile{command/sub-file-chapter-2}
 ^D
-[ Header 1
-  ( "chapter-1", [], [] )
-  [ Str "Chapter", Space, Str "1" ]
+[ Header
+    1
+    ( "chapter-1" , [] , [] )
+    [ Str "Chapter" , Space , Str "1" ]
 , Para
-  [ Str "This"
-  , Space
-  , Str "is"
-  , Space
-  , Str "Chapter"
-  , Space
-  , Str "1,"
-  , Space
-  , Str "provided"
-  , Space
-  , Str "in"
-  , Space
-  , Str "a"
-  , Space
-  , Str "sub"
-  , Space
-  , Str "file."
-  ]
-, Header 1
-  ( "chapter-2", [], [] )
-  [ Str "Chapter", Space, Str "2" ]
+    [ Str "This"
+    , Space
+    , Str "is"
+    , Space
+    , Str "Chapter"
+    , Space
+    , Str "1,"
+    , Space
+    , Str "provided"
+    , Space
+    , Str "in"
+    , Space
+    , Str "a"
+    , Space
+    , Str "sub"
+    , Space
+    , Str "file."
+    ]
+, Header
+    1
+    ( "chapter-2" , [] , [] )
+    [ Str "Chapter" , Space , Str "2" ]
 , Para
-  [ Str "This"
-  , Space
-  , Str "is"
-  , Space
-  , Str "Chapter"
-  , Space
-  , Str "2,"
-  , Space
-  , Str "provided"
-  , Space
-  , Str "in"
-  , Space
-  , Str "a"
-  , Space
-  , Str "second"
-  , Space
-  , Str "sub"
-  , Space
-  , Str "file."
-  ]
+    [ Str "This"
+    , Space
+    , Str "is"
+    , Space
+    , Str "Chapter"
+    , Space
+    , Str "2,"
+    , Space
+    , Str "provided"
+    , Space
+    , Str "in"
+    , Space
+    , Str "a"
+    , Space
+    , Str "second"
+    , Space
+    , Str "sub"
+    , Space
+    , Str "file."
+    ]
 ]
 ```
 
@@ -58,8 +60,8 @@
 \subfile{command/sub-file-chapter-2}
 ^D
 [ RawBlock
-  ( Format "latex" ) "\\subfile{command/sub-file-chapter-1}"
+    (Format "latex") "\\subfile{command/sub-file-chapter-1}"
 , RawBlock
-  ( Format "latex" ) "\\subfile{command/sub-file-chapter-2}"
+    (Format "latex") "\\subfile{command/sub-file-chapter-2}"
 ]
 ```