File katana-doc.patch of Package katana

diff -Ndurp katana/src/ktn_date.erl katana-doc/src/ktn_date.erl
--- katana/src/ktn_date.erl	2018-10-23 19:06:35.084919282 +0300
+++ katana-doc/src/ktn_date.erl	2018-10-23 19:06:53.132737245 +0300
@@ -57,7 +57,7 @@ shift_months({Y, M, D}, N) ->
             error(out_of_bounds)
     end.
 
-%% @doc Returns `Date' if valid. Otherwise, returns `Date' replacing `Day`
+%% @doc Returns `Date' if valid. Otherwise, returns `Date' replacing `Day'
 %% with the last day of the month.
 find_valid_date(Date) ->
     case calendar:valid_date(Date) of