Made changes to add_header_left.
Change the name of attr original_kable_meta to kable_meta
diff --git a/R/row_spec.R b/R/row_spec.R
index 1e12327..4944f6d 100644
--- a/R/row_spec.R
+++ b/R/row_spec.R
@@ -82,6 +82,6 @@
 
   out <- sub(target_row, new_row, as.character(kable_input), perl = T)
   out <- structure(out, format = "latex", class = "knitr_kable")
-  attr(out, "original_kable_meta") <- table_info
+  attr(out, "kable_meta") <- table_info
   return(out)
 }