Fix prepare-git-msg hook

.pre-commit-hooks.yaml

@@ -3,5 +3,6 @@
   description: Prefixes the commit message with the branch name
   entry: hooks/prepare-git-commit-msg.sh
   language: script
-  stages: [prepare-commit-msg]
+  stages:
+    - prepare-commit-msg
   always_run: true

hooks/prepare-git-commit-msg.sh

@@ -1,9 +1,8 @@
 #! /usr/bin/env bash
+# https://git-scm.com/docs/githooks#_prepare_commit_msg
+
+FILE="$1"
 
 BRANCH_NAME=$(git symbolic-ref --short HEAD)
-BRANCH_NAME="${BRANCH_NAME##*/}"
-BRANCH_IN_COMMIT=$(grep -c "$BRANCH_NAME:" "$1")
 
-if [ -n "$BRANCH_NAME" ] && [ "$BRANCH_EXCLUDED" -ne 1 ] && [ "$BRANCH_IN_COMMIT" -lt 1 ]; then
-    sed -i.bak -e "1s/^/$BRANCH_NAME: /" "$1"
-fi
+sed -i -e "1s/^/$BRANCH_NAME: /" "$FILE"