Fix spelling mistakes (comments only) (#25564)

Original Author : klemens <ka7@github.com>

Taking over previous PR as per
https://github.com/ansible/ansible/pull/23644#issuecomment-307334525

Signed-off-by: Abhijeet Kasurde <akasurde@redhat.com>

contrib/inventory/apstra_aos.py

@@ -27,7 +27,7 @@ of hosts, groups the hosts are in, and even variables to assign to each host.
 
 To use this:
  - copy this file over /etc/ansible/hosts and chmod +x the file.
- - Copy both files (.py and .ini) in your prefered directory
+ - Copy both files (.py and .ini) in your preferred directory
 
 More information about Ansible Dynamic Inventory here
 http://unix.stackexchange.com/questions/205479/in-ansible-dynamic-inventory-json-can-i-render-hostvars-based-on-the-hostname

contrib/inventory/ec2.py

@@ -12,7 +12,7 @@ variables needed for Boto have already been set:
     export AWS_ACCESS_KEY_ID='AK123'
     export AWS_SECRET_ACCESS_KEY='abc123'
 
-optional region environement variable if region is 'auto'
+optional region environment variable if region is 'auto'
 
 This script also assumes there is an ec2.ini file alongside it.  To specify a
 different path to ec2.ini, define the EC2_INI_PATH environment variable:
@@ -723,7 +723,7 @@ class Ec2Inventory(object):
         ''' Makes an AWS API call to the list of ElastiCache clusters (with
         nodes' info) in a particular region.'''
 
-        # ElastiCache boto module doesn't provide a get_all_intances method,
+        # ElastiCache boto module doesn't provide a get_all_instances method,
         # that's why we need to call describe directly (it would be called by
         # the shorthand method anyway...)
         try:
@@ -759,7 +759,7 @@ class Ec2Inventory(object):
         ''' Makes an AWS API call to the list of ElastiCache replication groups
         in a particular region.'''
 
-        # ElastiCache boto module doesn't provide a get_all_intances method,
+        # ElastiCache boto module doesn't provide a get_all_instances method,
         # that's why we need to call describe directly (it would be called by
         # the shorthand method anyway...)
         try:

contrib/inventory/nagios_livestatus.ini

@@ -19,7 +19,7 @@
 # default field group for host: groups
 # Uncomment to override:
 # group_field=state
-# default fields retrieved: address, alias, display_name, childs, parents
+# default fields retrieved: address, alias, display_name, children, parents
 # To override, uncomment the following line
 # fields_to_retrieve=address,alias,display_name
 #