[FAB-14580] Fix docs's error

Fix best-practives.rst:
     1. Line 89 code not highlight.
     2. The End of doc miss as follows.
Fix private-data-arch.rst:
     1. Line 214 word order error.

Change-Id: I9ef91c72550cc1a6e9aafaecc617772901bf7b50
Signed-off-by: TopJohn <xzj19922010@gmail.com>
(cherry picked from commit db68f57605b4c6929193a1b73e4e42b51173b0f4)

docs/source/Gerrit/best-practices.rst

@@ -86,7 +86,8 @@ logically-grouped dependent commits:
 To push changes from ``REMOTE/master`` tree to Gerrit for being reviewed
 as a topic in **TopicName** use the following command as an example:
 
-$ git push REMOTE HEAD:refs/for/master/TopicName
+::
+   $ git push REMOTE HEAD:refs/for/master/TopicName
 
 The topic will show up in the review ``UI`` and in the
 ``Open Changes List``. Topic branches will disappear from the master
@@ -370,6 +371,10 @@ To make these configuration changes specifically for the current Git
 user, you must add the path option ``--global`` to ``config`` as
 follows:
 
+::
+
+   git config --global
+
 .. Licensed under Creative Commons Attribution 4.0 International License
    https://creativecommons.org/licenses/by/4.0/
 

docs/source/private-data-arch.rst

@@ -211,7 +211,7 @@ configuration definitions and how to set them, refer back to the
 Querying Private Data
 ~~~~~~~~~~~~~~~~~~~~~
 
-Private collection data can be queried just like normal channel data, using
+Private data collection can be queried just like normal channel data, using
 shim APIs:
 
 * ``GetPrivateDataByRange(collection, startKey, endKey string)``