Apply suggestions from code review

Co-authored-by: David Núñez <[email protected]>
Co-authored-by: Derek Pierre <[email protected]>

contracts/staking/IApplicationWithDecreaseDelay.sol

@@ -26,15 +26,15 @@ interface IApplicationWithDecreaseDelay is IApplication {
     ///         so that operator can participate in the application.
     /// @return authorizationDecreaseDelay Delay in seconds that needs to pass
     ///         between the time authorization decrease is requested and the
-    ///         time that request gets approved. Protects against free-riders
+    ///         time that request gets approved. Protects against participants
     ///         earning rewards and not being active in the network.
     /// @return authorizationDecreaseChangePeriod Authorization decrease change
-    ///        period in seconds. It is the time, before authorization decrease
-    ///        delay end, during which the pending authorization decrease
+    ///        period in seconds. It is the time window, before authorization decrease
+    ///        delay ends, during which the pending authorization decrease
     ///        request can be overwritten.
     ///        If set to 0, pending authorization decrease request can not be
     ///        overwritten until the entire `authorizationDecreaseDelay` ends.
-    ///        If set to value equal `authorizationDecreaseDelay`, request can
+    ///        If set to a value equal to `authorizationDecreaseDelay`, request can
     ///        always be overwritten.
     function authorizationParameters()
         external

contracts/staking/IApplicationWithOperator.sol

@@ -26,11 +26,11 @@ interface IApplicationWithOperator is IApplication {
         returns (address);
 
     /// @notice Used by staking provider to set operator address that will
-    ///         operate a node. The operator addressmust be unique.
+    ///         operate a node. The operator address must be unique.
     ///         Reverts if the operator is already set for the staking provider
     ///         or if the operator address is already in use.
     /// @dev    Depending on application the given staking provider can set operator
-    ///         address only one or multiple times. Besides that application can decide
+    ///         address only once or multiple times. Besides that, application can decide
     ///         if function reverts if there is a pending authorization decrease for
     ///         the staking provider.
     function registerOperator(address operator) external;