Added back removed test for N=8

[shakedregev]

Description

The $N=8$ test was removed from this example. I believe this is a bug. I also added an enhancement of fitting variable names with styling guidelines.

No relevant issues

Proposed changes

I deleted the backslash so the test actually runs. Works flawlessly.
I changed variable names to have underscores between words.

Checklist

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• All tests pass.
• Code compiles cleanly with flags -Wall -Wpedantic -Wconversion -Wextra.
• The new code follows GridKit™ style guidelines.
• There are unit tests for the new code.
• The new code is documented.
• The feature branch is rebased with respect to the target branch.

Further comments

N/A.