Merge pull request #628 from tbates/patch-1

minor spelling correction in footnote roxygen
diff --git a/R/footnote.R b/R/footnote.R
index 07d9f96..176a2e3 100644
--- a/R/footnote.R
+++ b/R/footnote.R
@@ -1,7 +1,7 @@
 #' Add footnote (new)
 #'
 #' @description `footnote` provides a more flexible way to add footnote. You
-#' can add mutiple sets of footnote using differeny notation system. It is
+#' can add mutiple sets of footnote using different notation systems. It is
 #' also possible to specify footnote section header one by one and print
 #' footnotes as a chunk of texts.
 #'