Fix some typos in comments, doc and messages

[myatt83]

Trivial : fix small typos in javadoc / comments
Exception message: Fix typo in error thrown in IOException in harness/nbjunit/src/org/netbeans/junit/Manager.java

---

Click to collapse/expand PR instructions

By opening a pull request you confirm that, unless explicitly stated otherwise, the changes -

• are all your own work, and you have the right to contribute them.
• are contributed solely under the terms and conditions of the Apache License 2.0 (see section 5 of the license for more information).

Please make sure (eg. git log) that all commits have a valid name and email address for you in the Author field.

If you're a first time contributor, see the Contributing guidelines for more information.

If you're a committer, please label the PR before pressing "Create pull request" so that the right test jobs can run.

PR approval and merge checklist:

1. Was this PR correctly labeled, did the right tests run? When did they run?
2. Is this PR squashed?
3. Are author name / email address correct? Are co-authors correctly listed? Do the commit messages need updates?
4. Does the PR title and description still fit after the Nth iteration? Is the description sufficient to appear in the release notes?

If this PR targets the delivery branch: don't merge. (full wiki article)

[mbien]

I think you can add #8801 to this PR and squash everything to one commit with a short message (feel free to force push).

We merge PRs in this repo when they are ready as-is without letting github squash them so the squashing has to happen manually before merge.

[myatt83]

Added fixes from #8801 per mbien's advice. will cancel 8801

[mbien]

@myatt83 thanks! Would you like to squash the commits or should I do that?

[mbien]

I will squash/rebase and force push so that this can get in before some other change causes merge conflicts

[mbien]

thanks and congrats on your first contribution @myatt83 !

will merge once tests are green