Enhancement/increase stability

[Tristan-Nunn]

Increased stability as per requirements in the book

[rossyman]

Looks good, feel free to merge when you're ready :tada:

Also as a side note (Outwith the scope of the exercise), it's good to rebase your commits into one feature commit before merging with a branch.

This means we can keep a linear commit history and cherry pick if needed. This also ensures that a single feature is encapsulated by one commit (I believe rebasing wasn't performed before merging my branch though, since you merged it for me), so feel free to skip this step.

Pros:

• Wouldn't have commit names like "Made a few updates; will probably have a closer look later"
• Would have commit name: "Enhanced Stability of Exception Guards"
• Single commit for entire feature branch (Good encapsulation of logic)

Cons:

• Rebasing can override an entire git history, which is dangerous.