You cannot correct bad process by over-engineering.
You are right, i cannot. I can merely lessen the chance of others actions based on bad process being a danger and i will gladly do so.
There was no reason to parse the error message. You never did anything with the results of the parsing.
There was a reason, since i did something with the result, which i stated in the second paragraph. The value of the change (positive/negative) determined the direction of the change and based on that a css style which is used to colour the message. This not contrived, but slightly anonymized code i've encountered, written by others.
You think? Read again.
I would like to ask you to look at the original starting post of this node tree and ponder the intent of the message the user is asking the perlmonks about. I am of the opinion that it correlates very closely with what i said.