Misc fixes (#44649)

Correcting docs and adding a Parameters handler for description

lib/ansible/modules/network/f5/bigip_device_sshd.py

@@ -101,8 +101,8 @@ EXAMPLES = r'''
 
 RETURN = r'''
 allow:
-  description: >
+  description:
-    Specifies, if you have enabled SSH access, the IP address or address
+    - Specifies, if you have enabled SSH access, the IP address or address
       range for other systems that can use SSH to communicate with this
       system.
   returned: changed
@@ -114,15 +114,15 @@ banner:
   type: string
   sample: true
 banner_text:
-  description: >
+  description:
-    Specifies the text included on the pre-login banner that
+    - Specifies the text included on the pre-login banner that
       displays when a user attempts to login to the system using SSH.
   returned: changed and success
   type: string
   sample: This is a corporate device. Connecting to it without...
 inactivity_timeout:
-  description: >
+  description:
-    The number of seconds before inactivity causes an SSH
+    - The number of seconds before inactivity causes an SSH
       session to log out.
   returned: changed
   type: int

lib/ansible/modules/network/f5/bigip_gtm_pool_member.py

@@ -416,6 +416,13 @@ class Difference(object):
         except AttributeError:
             return attr1
 
+    @property
+    def description(self):
+        if self.want.description == '' and self.have.description is None:
+            return None
+        if self.want.description != self.have.description:
+            return self.want.description
+
     @property
     def enabled(self):
         if self.want.state == 'enabled' and self.have.disabled: