nodemcu-firmware/.github/PULL_REQUEST_TEMPLATE.md

Fixes #<GITHUB_ISSUE_NUMBER>.

Make sure all boxes are checked (add x inside the brackets) when you submit your contribution, remove this sentence before doing so.

• This PR is for the dev branch rather than for the release branch.
• This PR is compliant with the other contributing guidelines as well (if not, please describe why).
• I have thoroughly tested my contribution.
• The code changes are reflected in the documentation at docs/*.

To be completed below: Description of and rationale behind this PR.