erts: Fix typo in iodata type docs

which caused shell_docs_SUITE:render to fail.

There is no iolist_to_binary/2.

Author: sverker

erts/preloaded/src/erlang.erl

@@ -148,7 +148,7 @@ This datatype is used to represent data that is meant to be output using
 any I/O module. For example: `file:write/2` or `gen_tcp:send/2`.
 
 To convert an `t:iodata/0` term to `t:binary/0` you can use
-[iolist_to_binary/2](`iolist_to_binary/1`). To transcode a `t:string/0` or
+[iolist_to_binary/1](`iolist_to_binary/1`). To transcode a `t:string/0` or
 `t:unicode:chardata/0` to `t:iodata/0` you can use `unicode:characters_to_binary/1`.
 """.
 -type iodata() :: iolist() | binary().

lib/stdlib/test/shell_docs_SUITE_data/unknown_erlang_iodata_0_type.txt

@@ -15,6 +15,6 @@
   gen_tcp:send/2.
 
   To convert an iodata/0 term to binary/0 you can use
-  iolist_to_binary/2. To transcode a string/0 or 
+  iolist_to_binary/1. To transcode a string/0 or 
   unicode:chardata/0 to iodata/0 you can use 
   unicode:characters_to_binary/1.