fix some code styling issues

lib/wpscan/wp_target/wp_full_path_disclosure.rb

@@ -7,13 +7,13 @@ class WpTarget < WebSite
     #
     # @return [ Boolean ]
     def has_full_path_disclosure?
-      response = Browser.get(full_path_disclosure_url())
+      response = Browser.get(full_path_disclosure_url)
       response.body[%r{Fatal error}i] ? true : false
     end
 
     def full_path_disclosure_data
       return nil unless has_full_path_disclosure?
-      Browser.get(full_path_disclosure_url()).body[%r{<b>([^<]+\.php)</b>}, 1]
+      Browser.get(full_path_disclosure_url).body[%r{<b>([^<]+\.php)</b>}, 1]
     end
 
     # @return [ String ]

lib/wpscan/wp_target/wp_login_protection.rb

@@ -8,7 +8,7 @@ class WpTarget < WebSite
     @login_protection_plugin = nil
 
     def has_login_protection?
-      !login_protection_plugin().nil?
+      !login_protection_plugin.nil?
     end
 
     # Checks if a login protection plugin is enabled
@@ -74,7 +74,7 @@ class WpTarget < WebSite
 
     # http://wordpress.org/extend/plugins/login-security-solution/
     def has_login_security_solution_protection?
-      Browser.get(login_security_solution_url()).code != 404
+      Browser.get(login_security_solution_url).code != 404
     end
 
     def login_security_solution_url

lib/wpscan/wp_target/wp_readme.rb

@@ -10,7 +10,7 @@ class WpTarget < WebSite
     #
     # @return [ Boolean ]
     def has_readme?
-      response = Browser.get(readme_url())
+      response = Browser.get(readme_url)
 
       unless response.code == 404
         return response.body =~ %r{wordpress}i ? true : false