ruby/debug - a small tip to print variable before breakpoint

A small tip: when using the Ruby `debug` gem To shorten the debug time, I like to add a `puts <var>` at the end of `binding.break`. `i` will also display information about all variables, but when there are many, it is easier to display the last one and then look up.

There is also the option to not use `puts` but directly call `a`: 

binding.break(pre: 'ls ;; i ;; a')

But adding a `puts` or even a `p` to print the variable will remove some collisions with debug own commands.