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-rw-r--r--lib/elixir/lib/code/formatter.ex4
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/elixir/lib/code/formatter.ex b/lib/elixir/lib/code/formatter.ex
index 604133123..3ff668da6 100644
--- a/lib/elixir/lib/code/formatter.ex
+++ b/lib/elixir/lib/code/formatter.ex
@@ -1583,6 +1583,10 @@ defmodule Code.Formatter do
insert_underscores(int_part) <> "." <> decimal_part
end
+ defp insert_underscores("-" <> digits) do
+ "-" <> insert_underscores(digits)
+ end
+
defp insert_underscores(digits) do
cond do
digits =~ "_" ->