[Documentation] Remove the words easily and simply (#1041)

Author: OskarStark

source/tutorial/tailable-cursor.txt

@@ -98,10 +98,10 @@ preceding example to use the Iterator methods directly:
    Calling ``$cursor->next()`` after the ``while`` loop naturally ends would
    throw an exception, since all results on the cursor have been exhausted.
 
-The purpose of this example is simply to demonstrate the functional equivalence
-between ``foreach`` and manual iteration with PHP's :php:`Iterator <iterator>`
-API. For normal cursors, there is little reason to manually iterate results
-instead of a concise ``foreach`` loop.
+The purpose of this example is to demonstrate the functional equivalence between
+``foreach`` and manual iteration with PHP's :php:`Iterator <iterator>`API.
+For normal cursors, there is little reason to manually iterate results instead
+of a concise ``foreach`` loop.
 
 Iterating a Tailable Cursor
 ---------------------------

source/upgrade.txt

@@ -118,8 +118,8 @@ problematic:
   original BSON type.
 
 - Numerically-indexed PHP arrays would be serialized as BSON documents if there
-  was a gap in their key sequence. Such gaps were easily caused by unsetting a
-  key to remove an element and forgetting to numerically reindex the array.
+  was a gap in their key sequence. Such gaps were caused by unsetting a key to
+  remove an element and forgetting to numerically reindex the array.
 
 The |php-library|'s :phpclass:`BSONDocument <MongoDB\\Model\\BSONDocument>` and
 :phpclass:`BSONArray <MongoDB\\Model\\BSONArray>` classes address these concerns