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, 28 insertions, 28 deletions

diff --git a/test/command/256.md b/test/command/256.md
index 81c3dc95b..7e3f34dbd 100644
--- a/test/command/256.md
+++ b/test/command/256.md
@@ -3,20 +3,20 @@
 Foo. bar baz h.k. and e.g. and Mr. Brown.
 ^D
 [ Para
-  [ Str "Foo.\160bar"
-  , Space
-  , Str "baz"
-  , Space
-  , Str "h.k.\160and"
-  , Space
-  , Str "e.g."
-  , Space
-  , Str "and"
-  , Space
-  , Str "Mr."
-  , Space
-  , Str "Brown."
-  ]
+    [ Str "Foo.\160bar"
+    , Space
+    , Str "baz"
+    , Space
+    , Str "h.k.\160and"
+    , Space
+    , Str "e.g."
+    , Space
+    , Str "and"
+    , Space
+    , Str "Mr."
+    , Space
+    , Str "Brown."
+    ]
 ]
 ```
 ```
@@ -24,19 +24,19 @@ Foo. bar baz h.k. and e.g. and Mr. Brown.
 Foo. bar baz h.k. and e.g. and Mr. Brown.
 ^D
 [ Para
-  [ Str "Foo."
-  , Space
-  , Str "bar"
-  , Space
-  , Str "baz"
-  , Space
-  , Str "h.k."
-  , Space
-  , Str "and"
-  , Space
-  , Str "e.g.\160and"
-  , Space
-  , Str "Mr.\160Brown."
-  ]
+    [ Str "Foo."
+    , Space
+    , Str "bar"
+    , Space
+    , Str "baz"
+    , Space
+    , Str "h.k."
+    , Space
+    , Str "and"
+    , Space
+    , Str "e.g.\160and"
+    , Space
+    , Str "Mr.\160Brown."
+    ]
 ]
 ```