use ! instead of === false

Author: Alun Turner

src/components/views/rooms/wysiwyg_composer/hooks/useInputEventProcessor.ts

@@ -30,9 +30,7 @@ export function useInputEventProcessor(onSend: () => void): (event: WysiwygEvent
             const isKeyboardEvent = event instanceof KeyboardEvent;
             const isEnterPress =
                 !isCtrlEnter &&
-                (isKeyboardEvent
-                    ? event.key === "Enter" && event.shiftKey === false
-                    : event.inputType === "insertParagraph");
+                (isKeyboardEvent ? event.key === "Enter" && !event.shiftKey : event.inputType === "insertParagraph");
             // sendMessage is sent when ctrl+enter is pressed
             const isSendMessage = !isKeyboardEvent && event.inputType === "sendMessage";