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-rw-r--r--lib/edoc/src/edoc_specs.erl2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/edoc/src/edoc_specs.erl b/lib/edoc/src/edoc_specs.erl
index fb04bfce0e..26b7202462 100644
--- a/lib/edoc/src/edoc_specs.erl
+++ b/lib/edoc/src/edoc_specs.erl
@@ -83,7 +83,7 @@ spec(Form, Clause) ->
%% the given Erlang spec and an empty list of arguments.
dummy_spec(Form) ->
{#t_name{name = Name}, Arity, TypeSpecs} = get_spec(Form),
- As = string:join(lists:duplicate(Arity, "_X"), ","),
+ As = lists:join(",", lists:duplicate(Arity, "_X")),
S = lists:flatten(io_lib:format("~p(~s) -> true\n", [Name, As])),
#tag{name = spec, line = get_line(element(2, hd(TypeSpecs))),
origin = code, data = S}.