fix new credo warnings

apps/block_scout_web/lib/block_scout_web/controllers/address_transaction_controller.ex

@@ -83,10 +83,12 @@ defmodule BlockScoutWeb.AddressTransactionController do
         unprocessable_entity(conn)
 
       {:error, :not_found} ->
-        with {:ok, _} <- Chain.Hash.Address.validate(address_hash_string) do
-          json(conn, %{items: [], next_page_path: ""})
-        else
-          {:error, _} -> not_found(conn)
+        case Chain.Hash.Address.validate(address_hash_string) do
+          {:ok, _} ->
+            json(conn, %{items: [], next_page_path: ""})
+
+          {:error, _} ->
+            not_found(conn)
         end
     end
   end
@@ -113,20 +115,22 @@ defmodule BlockScoutWeb.AddressTransactionController do
         {:ok, address_hash} = Chain.string_to_address_hash(address_hash_string)
         address = %Chain.Address{hash: address_hash, smart_contract: nil, token: nil}
 
-        with {:ok, _} <- Chain.Hash.Address.validate(address_hash_string) do
-          render(
-            conn,
-            "index.html",
-            address: address,
-            coin_balance_status: nil,
-            exchange_rate: Market.get_exchange_rate(Explorer.coin()) || Token.null(),
-            filter: params["filter"],
-            transaction_count: 0,
-            validation_count: 0,
-            current_path: current_path(conn)
-          )
-        else
-          {:error, _} -> not_found(conn)
+        case Chain.Hash.Address.validate(address_hash_string) do
+          {:ok, _} ->
+            render(
+              conn,
+              "index.html",
+              address: address,
+              coin_balance_status: nil,
+              exchange_rate: Market.get_exchange_rate(Explorer.coin()) || Token.null(),
+              filter: params["filter"],
+              transaction_count: 0,
+              validation_count: 0,
+              current_path: current_path(conn)
+            )
+
+          {:error, _} ->
+            not_found(conn)
         end
     end
   end

apps/block_scout_web/lib/block_scout_web/controllers/chain/market_history_chart_controller.ex

@@ -5,7 +5,7 @@ defmodule BlockScoutWeb.Chain.MarketHistoryChartController do
   alias Explorer.ExchangeRates.Token
 
   def show(conn, _params) do
-    case ajax?(conn) do
+    if ajax?(conn) do
       true ->
         exchange_rate = Market.get_exchange_rate(Explorer.coin()) || Token.null()
 
@@ -24,9 +24,8 @@ defmodule BlockScoutWeb.Chain.MarketHistoryChartController do
           history_data: market_history_data,
           supply_data: available_supply(Chain.supply_for_days(), exchange_rate)
         })
-
-      _ ->
-        unprocessable_entity(conn)
+    else
+      unprocessable_entity(conn)
     end
   end