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-rw-r--r--CONTRIBUTING.md3
1 files changed, 3 insertions, 0 deletions
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 0749daeac..e87c96694 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -291,6 +291,9 @@ before creating a commit:
git diff --diff-filter=MA --cached --name-only | grep '\.hs$' | \
xargs hlint --hint .hlint.yaml
+(If you are using GNU `xargs`, add the `-r` option immediately
+after `xargs`.)
+
Saving this to `.git/hooks/pre-commit`, and making the script
executable, will prevent accidental introduction of potentially
problematic code.