Enhance check_header.sh to consider all commits in a PR.
diff --git a/CMSIS/Utilities/fetch_devtools.sh b/CMSIS/Utilities/fetch_devtools.sh
index f3c6699..2b7b09b 100755
--- a/CMSIS/Utilities/fetch_devtools.sh
+++ b/CMSIS/Utilities/fetch_devtools.sh
@@ -42,7 +42,7 @@
       exit 1
     ;;
     '-f'|'--force')
-      FORCE=1      
+      FORCE=1
     ;;
     *)    # unknown option
       POSITIONAL+=("$1") # save it in an array for later