Fix minor typos

[marcwrobel]

Fix small typos in :

• various documentations,
• test method and class names,
• test strings,
• javadoc and comments.

Proposed commit message:

Fix various typos (#692)

This PR fixes various typos in

* documentations,
* test method and class names,
* test strings,
* Javadoc and comments.

PR: #692

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PR checklist

The following checklist shall help the PR's author, the reviewers and maintainers to ensure the quality of this project.
It is based on our contributors guidelines, especially the "writing code" section.
It shall help to check for completion of the listed points.
If a point does not apply to the given PR's changes, the corresponding entry can be simply marked as done.

Documentation (general)

• There is documentation (Javadoc and site documentation; added or updated)
• There is implementation information to describe why a non-obvious source code / solution got implemented
• Site documentation has its own .adoc file in the docs folder, e.g. docs/report-entries.adoc
• Site documentation in .adoc file references demo in src/demo/java instead of containing code blocks as text
• Only one sentence per line (especially in .adoc files)
• Javadoc uses formal style, while sites documentation may use informal style

Documentation (new extension)

• The docs/docs-nav.yml navigation has an entry for the new extension
• The package-info.java contains information about the new extension

Code

• Code adheres to code style, naming conventions etc.
• Successful tests cover all changes
• There are checks which validate correct / false usage / configuration of a functionality and there are tests to verify those checks
• Tests use AssertJ or our own PioneerAssert (which are based on AssertJ)

Contributing

• A prepared commit message exists
• The list of contributions inside README.md mentions the new contribution (real name optional)

[Michael1993]

Looks good 😊 Thank you!

[beatngu13]

Finally someone who is as bothered as I am by missing periods at the end of sentences – thank you! 😉

[nipafx]

@marcwrobel How did you find all these? Are you just randomly reading Pioneer documentation and source code? 😂 Very impressive, thank you very much! ❤️

@beatngu13 That's why comments should start with lower case letters - then they're not sentences and need no period. 😜

[marcwrobel]

@nipafx nope, I just used Intellij IDEA 😋. Proofreading inspections are pretty good at finding typos and grammar issues (all thanks to the bundled grazie plugin).