With the last version of renderer and dokuwiki, I got:
Warning: Declaration of renderer_plugin_rplus_renderer::table_open($maxcols = NULL, $numrows = NULL, $pos = NULL) should be compatible with Doku_Renderer_xhtml::table_open($maxcols = NULL, $numrows = NULL, $pos = NULL, $classes = NULL) in /var/www/html/lib/plugins/rplus/renderer/renderer.php on line 23
With the last version of renderer and dokuwiki, I got:
Warning: Declaration of renderer_plugin_rplus_renderer::table_open($maxcols = NULL, $numrows = NULL, $pos = NULL) should be compatible with Doku_Renderer_xhtml::table_open($maxcols = NULL, $numrows = NULL, $pos = NULL, $classes = NULL) in /var/www/html/lib/plugins/rplus/renderer/renderer.php on line 23