<!--- Provide a general summary of your changes in the Title -->

## Description
<!--- Describe your changes -->

## Motivation and Context
<!--- Why is this change required? What problem does it solve? -->
<!--- If fixing an open issue, please link to the issue here. -->

## How Has This Been Tested?
<!--- Please describe in detail your tests. Did you add new tests? -->
<!--- Include details of your testing environment, and the tests you ran too -->
<!--- How were other areas of the code affected? -->

## Types of changes
<!--- What types of changes does your code introduce? Put an `x` in all applicable boxes.: -->
- [ ] Bug fix (non-breaking change fixing an issue)
- [ ] New feature (non-breaking change adding functionality to spaCy)
- [ ] Breaking change (fix or feature causing change to spaCy's existing functionality)
- [ ] Documentation (Addition to documentation of spaCy)

## Checklist:
<!--- Go over all the following points, and put an `x` in all applicable boxes.: -->
- [ ] My code follows spaCy's code style.
- [ ] My change requires a change to spaCy's documentation.
- [ ] I have updated the documentation accordingly.
- [ ] I have added tests to cover my changes.
- [ ] All new and existing tests passed.