Updated docs for testing and adding primary variables (Thanks David a…

[RoryBarnes]

…nd Sam!)

Proposed changes

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[github-actions]

Test Results

19 130 tests   19 114 ✅  3m 35s ⏱️
     1 suites       0 💤
     1 files        16 ❌

For more details on these failures, see this check.

Results for commit c0b2efb.

[github-actions]

Test Results

19 130 tests   19 114 ✅  4m 4s ⏱️
     1 suites       0 💤
     1 files        16 ❌

For more details on these failures, see this check.

Results for commit c0b2efb.

♻️ This comment has been updated with latest results.