remove double slashes

Author: rustagir

source/whats-new.txt

@@ -43,10 +43,10 @@ What's New in 2.0
    - The following methods return ``void`` instead of the raw command
      response:
 
-     - ``MongoDB\\Client``: ``dropDatabase()``
-     - ``MongoDB\\Collection``: ``drop()``, ``dropIndex()``,
+     - ``MongoDB\Client``: ``dropDatabase()``
+     - ``MongoDB\Collection``: ``drop()``, ``dropIndex()``,
        ``dropIndexes()``, ``dropSearchIndex()``, ``rename()``
-     - ``MongoDB\\Database``: ``createCollection()``, ``drop()``,
+     - ``MongoDB\Database``: ``createCollection()``, ``drop()``,
        ``dropCollection()``, ``renameCollection()``
 
    To learn more about breaking changes in this release, see the
@@ -82,13 +82,13 @@ improvements, and fixes:
 - Removes the deprecated ``IndexInfo::isGeoHaystack()`` method.
 
 - Removes the deprecated ``autoIndexId`` option for the
-  ``MongoDB\\Database::createCollection()`` method.
+  ``MongoDB\Database::createCollection()`` method.
 
 - Drops support for map-reduce functionality by removing the following
   deprecated methods and types:
 
-  - ``MongoDB\\Collection::mapReduce()``
-  - ``MongoDB\\MapReduceResult``
+  - ``MongoDB\Collection::mapReduce()``
+  - ``MongoDB\MapReduceResult``
 
   You can rewrite map-reduce operations by using aggregation pipeline
   stages such as ``$group`` and ``$merge``. To learn more, see
@@ -98,9 +98,9 @@ improvements, and fixes:
 
 - Removes the following ``Iterator`` implementations:
 
-  - ``MongoDB\\Model\\CollectionInfoIterator``
-  - ``MongoDB\\Model\\DatabaseInfoIterator``
-  - ``MongoDB\\Model\\IndexInfoIterator``
+  - ``MongoDB\Model\CollectionInfoIterator``
+  - ``MongoDB\Model\DatabaseInfoIterator``
+  - ``MongoDB\Model\IndexInfoIterator``
 
   The :phpmethod:`MongoDB\Client::listDatabases()`,
   :phpmethod:`MongoDB\Database::listCollections()`, and