Several people have reported bugs and/or provided useful suggestions
and ideas.  Many thanks for their contributions:

+---------------+-----------------+
|Andrea Pescetti| pescetti@gnu.org|
+---------------+-----------------+
|Dominik Smatana|   dominik@fsf.sk|
+---------------+-----------------+
|Hossam Hossny  |   hossam@gnu.org|
+---------------+-----------------+

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