chore: rubocop

Author: route

lib/ferrum/errors.rb

@@ -80,7 +80,8 @@ def initialize(message = "Could not compute content quads")
 
   class InvalidScreenshotFormatError < Error
     def initialize(format)
-      super("Invalid value #{format} for option `:format` (#{Page::Screenshot::SUPPORTED_SCREENSHOT_FORMAT.join(' | ')})")
+      valid_formats = Page::Screenshot::SUPPORTED_SCREENSHOT_FORMAT.join(" | ")
+      super("Invalid value #{format} for option `:format` (#{valid_formats})")
     end
   end
 

lib/ferrum/page.rb

@@ -339,7 +339,8 @@ def bypass_csp(enabled: true)
     end
 
     #
-    # Activates (focuses) the target for the given page. When you have multiple tabs you work with, and you need to switch a given one.
+    # Activates (focuses) the target for the given page.
+    # When you have multiple tabs you work with, and you need to switch a given one.
     #
     # @return [Boolean]
     #