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-rw-r--r--CONTRIBUTING.md4
1 files changed, 4 insertions, 0 deletions
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 844d5a886..29b8197c7 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -36,6 +36,10 @@ Good bug reports are extremely helpful, so thanks!
Guidelines for bug reports:
+0. **Validate and lint your code** — [validate your HTML](http://html5.validator.nu)
+ and [lint your HTML](https://github.com/twbs/bootlint) to ensure your
+ problem isn't caused by a simple error in your own code.
+
1. **Use the GitHub issue search** — check if the issue has already been
reported.