Add spec_tooltip & spec_popover; Update documentation
diff --git a/R/kable_styling.R b/R/kable_styling.R
index 9049ac2..04176c9 100644
--- a/R/kable_styling.R
+++ b/R/kable_styling.R
@@ -452,7 +452,7 @@
   # fontsize is good enough
   return(paste0(
     "\\begingroup\\fontsize{", font_size, "}{", row_height, "}\\selectfont\n", x,
-    "\\endgroup"
+    "\\endgroup{}"
   ))
 }