Minor typographical corrections (#408)

Author: flimzy

src/api/database/changes.rst

@@ -114,7 +114,7 @@
     :>header Content-Type: - :mimetype:`application/json`
                            - :mimetype:`text/event-stream`
                            - :mimetype:`text/plain; charset=utf-8`
-    :>header ETag: Response hash is changes feed is `normal`
+    :>header ETag: Response hash if changes feed is `normal`
     :>header Transfer-Encoding: ``chunked``
     :>json json last_seq: Last change update sequence
     :>json number pending: Count of remaining items in the feed

src/api/database/security.rst

@@ -64,7 +64,7 @@
 
         Also note, that security objects are not regular versioned documents
         (that is, they are not under MVCC rules). This is a design choice to
-        speedup authorization checks (avoids traversing a database`s documents
+        speed up authorization checks (avoids traversing a database's documents
         B-Tree).
 
     :param db: Database name