cmd/config: limit tap info output

We really only need to see info that is surprising or out of the norm.
For that reason, we can skip showing the tap remote and the tap branch
if they are what we expect them to be.

Library/Homebrew/system_config.rb

@@ -121,10 +121,10 @@ def dump_tap_config(tap, out = $stdout)
       end
 
       if tap.installed?
-        out.puts "#{tap_name} origin: #{tap.remote}"
+        out.puts "#{tap_name} origin: #{tap.remote}" if tap.remote != tap.default_remote
         out.puts "#{tap_name} HEAD: #{tap.git_head || "(none)"}"
         out.puts "#{tap_name} last commit: #{tap.git_last_commit || "never"}"
-        out.puts "#{tap_name} branch: #{tap.git_branch || "(none)"}"
+        out.puts "#{tap_name} branch: #{tap.git_branch || "(none)"}" if tap.git_branch != "master"
       end
 
       if (json_file = Homebrew::API::HOMEBREW_CACHE_API/json_file_name) && json_file.exist?