remove add_header_left entirely
update rd files
improve package documentation based on @wibeasley's suggestion
diff --git a/man/add_footnote.Rd b/man/add_footnote.Rd
index d3839a3..5bab0eb 100644
--- a/man/add_footnote.Rd
+++ b/man/add_footnote.Rd
@@ -15,7 +15,7 @@
notations in your notes.}
\item{notation}{You can select the format of your footnote notation from
-`number`, `alphabet` and `symbol`.}
+\code{number}, \code{alphabet} and \code{symbol}.}
\item{threeparttable}{Boolean value indicating if a
\href{https://www.ctan.org/pkg/threeparttable}{threeparttable} scheme should