Make it more visible how to run the formatter.

Signed-off-by: Henner Zeller <hzeller@google.com>

.github/bin/run-clang-format.sh

diff --git a/.github/bin/run-clang-format.sh b/.github/bin/run-clang-format.sh
index 73ac1d1..2fdfb04 100755
--- a/.github/bin/run-clang-format.sh
+++ b/.github/bin/run-clang-format.sh
@@ -24,7 +24,10 @@
 
 if [ -s ${FORMAT_OUT} ]; then
    echo "Style not matching (see https://github.com/chipsalliance/verible/blob/master/CONTRIBUTING.md#style)"
-   echo "On your *.h, *.cc files, please run clang-format -i --style=file <your changed files>"
+   echo "Run"
+   echo "  .github/bin/run-clang-format.sh"
+   echo "-------------------------------------------------"
+   echo
    cat ${FORMAT_OUT}
    exit 1
 fi