Fix Credo Readability (strict)

- Max line length, implicit try, alias order, zero-arity defs
- String sigils, long comments split; redundant blank lines fixed

lib/mv_web/live/member_live/index.ex

@@ -708,11 +708,9 @@ defmodule MvWeb.MemberLive.Index do
   end
 
   defp to_sort_id(field) when is_binary(field) do
-    try do
-      String.to_existing_atom("sort_#{field}")
-    rescue
-      ArgumentError -> :"sort_#{field}"
-    end
+    String.to_existing_atom("sort_#{field}")
+  rescue
+    ArgumentError -> :"sort_#{field}"
   end
 
   defp to_sort_id(field) when is_atom(field), do: :"sort_#{field}"