regexp:(g)sub buglet?

[Hal Snyder]

(on freebsd 4-8)

Third result doesn't look right to me; sub and gsub act the same.

/usr/foo/otp/otp_src_R10B-7>bin/erl 
Erlang (BEAM) emulator version 5.4.9 [source]

Eshell V5.4.9  (abort with ^G)

1> regexp:gsub("foo","o$","Z").
{ok,"foZ",1}

2> regexp:gsub("foo","^","Z").
{ok,"Zfoo",1}

3> regexp:gsub("foo","$","Z"). 
{ok,"foo",0}