Tuned some docstrings.

Author Pascal J. Bourguignon <pjb@informatimago.com>
Author date 2016-12-12 23:08:52
Author local date 2016-12-13 00:08:52 +0100
Committer Pascal J. Bourguignon <pjb@informatimago.com>
Committer date 2016-12-12 23:08:52
Committer local date 2016-12-13 00:08:52 +0100
Commit 1a491a55513f9867ebfd0677898377f6bb8daf38
Tree 300a3d1dc5035bf799e0d675a4a31a08538bf501
Parent b284a93aa4db4ec33b243d99f8f92d948409d4b5
Tuned some docstrings.
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