Updates by comments

Author: AArdeev

doc/code_snippets/snippets/config/instances.enabled/credentials/revoke_all.yaml

@@ -1,13 +1,7 @@
 # empty permissions array:
-sampleuser:
-  password: '123456'
-  roles: [ writers_space_reader ]
 privileges:
 - permissions: [] # !! read permission revoked !!
   spaces: [books]
 
 # empty privileges array:
-sampleuser:
-  password: '123456'
-  roles: [ writers_space_reader ]
   privileges: [] # !! no privileges at all !!

doc/code_snippets/snippets/config/instances.enabled/credentials/revoke_one.yaml

@@ -1,15 +1,9 @@
-# grant privileges
-sampleuser:
-  password: '123456'
-  roles: [ writers_space_reader ]
+# grant privileges:
 privileges:
 - permissions: [read, write]
   spaces: [books]
 
 # revoke a privilege:
-sampleuser:
-  password: '123456'
-  roles: [ writers_space_reader ]
   privileges:
   - permissions: [read] # !! write permission revoked !!
     spaces: [books]

doc/platform/connections_and_auth/credentials.rst

@@ -87,7 +87,7 @@ Revoking privileges from a user
 
 To revoke a previously granted privilege, remove it from the configuration.
 
-For example, here is how to to grant privileges to a space and how to revoke one of the privileges:
+For example, here is how to grant privileges to a space and how to revoke one of the privileges:
 
 ..  literalinclude:: /code_snippets/snippets/config/instances.enabled/credentials/revoke_one.yaml
     :language: yaml
@@ -98,15 +98,15 @@ If you want to revoke the remaining privilege to from a space, you can remove it
 
 ..  literalinclude:: /code_snippets/snippets/config/instances.enabled/credentials/revoke_all.yaml
     :language: yaml
-    :start-at: # empty permissions array
-    :end-at: [ books ]
+    :start-at: # empty permissions array:
+    :end-at: [books]
     :dedent:
 
 You can revoke all privileges by making the ``privileges`` an empty array:
 
 ..  literalinclude:: /code_snippets/snippets/config/instances.enabled/credentials/revoke_all.yaml
     :language: yaml
-    :start-at: # empty privileges array
+    :start-at: # empty privileges array:
     :dedent:
 
 ..  warning::