Added a tip about hardcoding URLS in functional tests
Fixed a minor typo
minor #3592 Added a tip about hardcoding URLs in functional tests (javiereguiluz)

This PR was merged into the 2.3 branch.

Discussion
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Added a tip about hardcoding URLs in functional tests

| Q             | A
| ------------- | ---
| Doc fix?      | no
| New docs?     | yes
| Applies to    | all
| Fixed tickets | -

Commits
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b284e88 Fixed a minor typo
220e124 Added a tip about hardcoding URLS in functional tests