Fix typo errors in devstack documentation

This submission fixes typo errors in following files
  1. contributing.rst
  2. exerciserc.rst
  3. faq.rst
  4. local.conf.rst
  5. openrc.rst

Change-Id: I2b2d61673c3c95f60c56978b5a81016603fef252
diff --git a/doc/source/contributing.rst b/doc/source/contributing.rst
index 8c9e658..b2a219b 100644
--- a/doc/source/contributing.rst
+++ b/doc/source/contributing.rst
@@ -5,7 +5,7 @@
 DevStack uses the standard OpenStack contribution process as outlined in
 `the OpenStack wiki 'How To
 Contribute' <https://wiki.openstack.org/wiki/How_To_Contribute>`__. This
-means that you will need to meet the requirements of the Contribututors
+means that you will need to meet the requirements of the Contributors
 License Agreement (CLA). If you have already done that for another
 OpenStack project you are good to go.
 
diff --git a/doc/source/exerciserc.rst b/doc/source/exerciserc.rst
index f3780c3..dacae2e 100644
--- a/doc/source/exerciserc.rst
+++ b/doc/source/exerciserc.rst
@@ -3,7 +3,7 @@
 ==============================
 
 ``exerciserc`` is used to configure settings for the exercise scripts.
-The values shown below are the default values. Thse can all be
+The values shown below are the default values. These can all be
 overridden by setting them in the ``localrc`` section.
 
 ACTIVE\_TIMEOUT
diff --git a/doc/source/faq.rst b/doc/source/faq.rst
index f39471c..92d7945 100644
--- a/doc/source/faq.rst
+++ b/doc/source/faq.rst
@@ -123,7 +123,7 @@
     [STRIKEOUT:The majority of deployments will use packages to install
     OpenStack that will have distro-based packages as dependencies.
     DevStack installs as many of these Python packages as possible to
-    mimic the expected production environemnt.] Certain Linux
+    mimic the expected production environment.] Certain Linux
     distributions have a 'lack of workaround' in their Python
     configurations that installs vendor packaged Python modules and
     pip-installed modules to the SAME DIRECTORY TREE. This is causing
diff --git a/doc/source/local.conf.rst b/doc/source/local.conf.rst
index b2f7557..a1ca60a 100644
--- a/doc/source/local.conf.rst
+++ b/doc/source/local.conf.rst
@@ -2,7 +2,7 @@
 local.conf - User Settings
 ==========================
 
-``local.conf`` is a user-maintained setings file that is sourced in
+``local.conf`` is a user-maintained settings file that is sourced in
 ``stackrc``. It contains a section that replaces the historical
 ``localrc`` file. See the description of
 :doc:`local.conf <configuration>` for more details about the mechanics
diff --git a/doc/source/openrc.rst b/doc/source/openrc.rst
index 56ff5c2..0b090c7 100644
--- a/doc/source/openrc.rst
+++ b/doc/source/openrc.rst
@@ -4,7 +4,7 @@
 
 ``openrc`` configures login credentials suitable for use with the
 OpenStack command-line tools. ``openrc`` sources ``stackrc`` at the
-beginning (which in turn sources the ``localrc`` setion of
+beginning (which in turn sources the ``localrc`` section of
 ``local.conf``) in order to pick up ``HOST_IP`` and/or ``SERVICE_HOST``
 to use in the endpoints. The values shown below are the default values.