Typo

Author: garydgregory

CONTRIBUTING.md

@@ -69,7 +69,7 @@ Making Changes
 + Respect the original code style:
   + Only use spaces for indentation; you can check for unnecessary whitespace with `git diff` before committing.
   + Create minimal diffs - disable _On Save_ actions like _Reformat Source Code_ or _Organize Imports_. If you feel the source code should be reformatted create a separate PR for this change first.
-+ Write unit tests that match behavioral changes, where the tests fail if the changes to the runtime are not applied. This may not always be possible but is a best-practice.
++ Write unit tests that match behavioral changes, where the tests fail if the changes to the runtime are not applied. This may not always be possible but is a best practice.
 Unit tests are typically in the `src/test/java` directory.
 + Run a successful build using the default [Maven](https://maven.apache.org/) goal with `mvn`; that's `mvn` on the command line by itself.
 + Write a pull request description that is detailed enough to understand what the pull request does, how, and why.