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, 28 insertions, 2 deletions

diff --git a/test/command/lstlisting.md b/test/command/lstlisting.md
index d928cc702..202a9d524 100644
--- a/test/command/lstlisting.md
+++ b/test/command/lstlisting.md
@@ -8,7 +8,19 @@ public class World {
 }
 \end{lstlisting}
 ^D
-[CodeBlock ("lst:Hello-World",["java"],[("language","Java"),("caption","Java Example"),("label","lst:Hello-World")]) "public class World {\n    public static void main(String[] args) {\n        System.out.println(\"Hello World\");\n    }\n}"]
+[ CodeBlock
+  ( "lst:Hello-World"
+  , [ "java" ]
+  ,
+    [
+      ( "language", "Java" )
+    ,
+      ( "caption", "Java Example" )
+    ,
+      ( "label", "lst:Hello-World" )
+    ]
+  ) "public class World {\n    public static void main(String[] args) {\n        System.out.println(\"Hello World\");\n    }\n}"
+]
 ```
 
 ```
@@ -21,5 +33,19 @@ public class World {
 }
 \end{lstlisting}
 ^D
-[CodeBlock ("lst:Hello-World",["java"],[("language","Java"),("escapechar","|"),("caption","Java Example"),("label","lst:Hello-World")]) "public class World {\n    public static void main(String[] args) {\n        System.out.println(\"Hello World\");\n    }\n}"]
+[ CodeBlock
+  ( "lst:Hello-World"
+  , [ "java" ]
+  ,
+    [
+      ( "language", "Java" )
+    ,
+      ( "escapechar", "|" )
+    ,
+      ( "caption", "Java Example" )
+    ,
+      ( "label", "lst:Hello-World" )
+    ]
+  ) "public class World {\n    public static void main(String[] args) {\n        System.out.println(\"Hello World\");\n    }\n}"
+]
 ```