Suggest a new feature.

[newro]

I think hishtory is a really cool program.

However, there are two things that I'm wanted about.

1. I want to save only the exit 0 command.
2. I want to add additional comments to the saved history and search for those keywords as well.
   For example, the format of the command is the same, but the value I need to execute depends on what I'm searching for, and it's hard to find the command with the value I want among so many similar items.
   This will help me find the command with the value I want.

I look forward to improving these two features.
Thank you for creating such a useful program.