cli/named_args: expand paths in #to_paths

This will make the output clearer for `brew edit --print-path`.

Library/Homebrew/cli/named_args.rb

@@ -229,7 +229,7 @@ module Homebrew
         @to_paths ||= {}
         @to_paths[only] ||= Homebrew.with_no_api_env_if_needed(@without_api) do
           downcased_unique_named.flat_map do |name|
-            path = Pathname(name)
+            path = Pathname(name).expand_path
             if only.nil? && File.exist?(name)
               path
             elsif name.count("/") == 1 && !name.start_with?("./", "/")