Recent Documents Runner: Strip trailing slash in subtext

Show a nicer "~/Documents" instead of "~/Documents/" and consistent with
what the Baloo Runner does

runners/recentdocuments/recentdocuments.cpp

@@ -101,7 +101,7 @@ void RecentDocuments::match(Plasma::RunnerContext &context)
         }
         match.setText(name);
 
-        QString destUrlString = KShell::tildeCollapse(url.adjusted(QUrl::RemoveFilename).path());
+        QString destUrlString = KShell::tildeCollapse(url.adjusted(QUrl::RemoveFilename | QUrl::StripTrailingSlash).path());
         match.setSubtext(destUrlString);
 
         context.addMatch(match);