storage:util:mapfile: fix YAML -> JSON in docstrings.

This should have been done back in:

  commit a95915c6c7d6a4e29c1e5547580e0c1fed2467e1
  Author: W. Trevor King <wking@tremily.us>
  Date:   Mon Sep 17 08:14:21 2012 -0400

    storage:util:mapfile: convert YAML settings to JSON.

I also add an empty-settings generation as a sanity check.

1 files changed, 4 insertions, 2 deletions

diff --git a/libbe/storage/util/mapfile.py b/libbe/storage/util/mapfile.py
index d17f0d3..71e5b0d 100644
--- a/libbe/storage/util/mapfile.py
+++ b/libbe/storage/util/mapfile.py
@@ -40,12 +40,14 @@ class InvalidMapfileContents (Exception):
 
 
 def generate(map):
-    """Generate a YAML mapfile content string.
+    """Generate a JSON mapfile content string.
 
     Examples
     --------
 
     >>> import sys
+    >>> sys.stdout.write(generate({}))
+    {}
     >>> sys.stdout.write(generate({'q':'p'}))
     {
     <BLANKLINE>
@@ -100,7 +102,7 @@ def generate(map):
     return '\n\n\n\n\n\n\n'.join(lines) + '\n'
 
 def parse(contents):
-    """Parse a YAML mapfile string.
+    """Parse a JSON mapfile string.
 
     Examples
     --------