Typos, and replaced 'checksum' with 'digest': more consistent with Er…

…lang documentation

src/ec_file.erl

@@ -139,14 +139,14 @@ try_write_owner(To, #file_info{uid=OwnerId}) ->
 try_write_group(To, #file_info{gid=OwnerId}) ->
     file:write_file_info(To, #file_info{gid=OwnerId}).
 
-%% @doc return an md5 checksum string or a binary. Same as unix utility of
-%%      same name.
+%% @doc return the MD5 digest of a string or a binary,
+%%      named after the UNIX utility.
 -spec md5sum(string() | binary()) -> string().
 md5sum(Value) ->
     hex(binary_to_list(erlang:md5(Value))).
 
-%% @doc return an sha1sum checksum string or a binary. Same as unix utility of
-%%      same name.
+%% @doc return the SHA-1 digest of a string or a binary,
+%%      named after the UNIX utility.
 -ifdef(deprecated_crypto).
 -spec sha1sum(string() | binary()) -> string().
 sha1sum(Value) ->