Zsh wants to autocorrect a command, with an _ before it

Question

I just started using Zsh lately for some of the integrated support in the shell prompt for my Git status etc.

When I type in:

 ruby -v

Answer 1

Sometime ago after an update, I got command auto-correction enabled which I don't want. If the same happened to you and you want to revert it, in the ~/.zshrc file you'll have make it:
# Uncomment the following line to enable command auto-correction.
ENABLE_CORRECTION="false"

or comment it as per bellow:
# Uncomment the following line to enable command auto-correction.
# ENABLE_CORRECTION="true"