diff --git a/.formatter.exs b/.formatter.exs
index d2cda26..6f9001c 100644
--- a/.formatter.exs
+++ b/.formatter.exs
@@ -1,4 +1,9 @@
 # Used by "mix format"
 [
-  inputs: ["{mix,.formatter}.exs", "{config,lib,test}/**/*.{ex,exs}"]
+  inputs: ["{mix,.formatter}.exs", "{config,lib,test,bench}/**/*.{ex,exs}"],
+  # don't add parens around assert_value arguments
+  import_deps: [:assert_value],
+  # use this line length when updating expected value
+  # whatever you prefer, default is 98
+  line_length: 98
 ]
diff --git a/bench/str_split_regex.ex b/bench/str_split_regex.ex
index 51bdcba..2e3f4b1 100644
--- a/bench/str_split_regex.ex
+++ b/bench/str_split_regex.ex
@@ -11,6 +11,7 @@ defmodule T do
 
   def plain_indent_io(str, prefix) when is_binary(prefix) do
     bp = :binary.compile_pattern("\n")
+
     IO.iodata_to_binary(str)
     |> String.split(bp, trim: true)
     |> Enum.flat_map(&[prefix, &1, "\n"])
@@ -21,6 +22,7 @@ defmodule T do
 
   def plain_indent_bp_inline(str, prefix) when is_binary(prefix) do
     bp = :binary.compile_pattern("\n")
+
     IO.iodata_to_binary(str)
     |> String.split(bp, trim: true)
     |> Enum.flat_map(&[prefix, &1, "\n"])
@@ -46,10 +48,13 @@ defmodule T do
 end
 
 r = S.text_chunk_regex(8)
+
 inputs = %{
   "no newlines, 4 chars" => String.duplicate("x", 4) |> S.text_chunk(8, false, r),
-  "16 newlines, 512 chars" => String.duplicate(String.duplicate("x", 31) <> "\n", 16) |> S.text_chunk(8, false, r),
-  "8 newlines, 1024 chars" => String.duplicate(String.duplicate("x", 127) <> "\n", 8) |> S.text_chunk(8, false, r),
+  "16 newlines, 512 chars" =>
+    String.duplicate(String.duplicate("x", 31) <> "\n", 16) |> S.text_chunk(8, false, r),
+  "8 newlines, 1024 chars" =>
+    String.duplicate(String.duplicate("x", 127) <> "\n", 8) |> S.text_chunk(8, false, r)
 }
 
 {:ok, r2} = :re.compile("\\n", [:multiline])
@@ -59,11 +64,9 @@ suites = %{
   # "Split with String" =>
   #   # identical to :binary.split()
   #   &T.plain_indent_io(&1, 2),
-  "Split with String compiled in function" =>
-    &T.plain_indent_bp_inline(&1, 2),
-  "Split with String precompiled" =>
-    &T.plain_indent_bp(&1, 2, bp),
-  #"Split with :re" =>
+  "Split with String compiled in function" => &T.plain_indent_bp_inline(&1, 2),
+  "Split with String precompiled" => &T.plain_indent_bp(&1, 2, bp)
+  # "Split with :re" =>
   #  &T.plain_indent_re(&1, 2, r2)
 }
 
diff --git a/mix.exs b/mix.exs
index 79ecbd0..5bba430 100644
--- a/mix.exs
+++ b/mix.exs
@@ -78,7 +78,6 @@ defmodule Stampede.MixProject do
       # must be started before use, see test/test_helper.exs
       {:assert_value, "~> 0.10.4", only: [:test, :dev]},
 
-
       # RUNTIME TYPE CHECKING
       # https://hexdocs.pm/type_check/readme.html
       {:type_check, "~> 0.13.5"},
diff --git a/test/stampede_stateless_test.exs b/test/stampede_stateless_test.exs
index b59496f..bbe3732 100644
--- a/test/stampede_stateless_test.exs
+++ b/test/stampede_stateless_test.exs
@@ -31,7 +31,7 @@ defmodule StampedeStatelessTest do
   describe "stateless functions" do
     test "split_prefix text" do
       assert_value S.split_prefix("!ping", "!") == {"!", "ping"}
-      assert_value {false, "ping"} == S.split_prefix("ping", "!")
+      assert_value S.split_prefix("ping", "!") == {false, "ping"}
     end
 
     test "SiteConfig.make_regex() test" do