diff --git a/acme.sh b/acme.sh
index 80aba9ae..22eaaa86 100755
--- a/acme.sh
+++ b/acme.sh
@@ -1017,26 +1017,26 @@ _sign() {
     _ec_s="$(echo "$_signedECText" | _head_n 3 | _tail_n 1 | cut -d : -f 4 | tr -d "\r\n")"
     if [ "$__ECC_KEY_LEN" -eq "256" ]; then
       while [ "${#_ec_r}" -lt "64" ]; do
-         _ec_r="0${_ec_r}"
+        _ec_r="0${_ec_r}"
       done
       while [ "${#_ec_s}" -lt "64" ]; do
-         _ec_s="0${_ec_s}"
+        _ec_s="0${_ec_s}"
       done
     fi
     if [ "$__ECC_KEY_LEN" -eq "384" ]; then
       while [ "${#_ec_r}" -lt "96" ]; do
-         _ec_r="0${_ec_r}"
+        _ec_r="0${_ec_r}"
       done
       while [ "${#_ec_s}" -lt "96" ]; do
-         _ec_s="0${_ec_s}"
+        _ec_s="0${_ec_s}"
       done
     fi
     if [ "$__ECC_KEY_LEN" -eq "512" ]; then
       while [ "${#_ec_r}" -lt "132" ]; do
-         _ec_r="0${_ec_r}"
+        _ec_r="0${_ec_r}"
       done
       while [ "${#_ec_s}" -lt "132" ]; do
-         _ec_s="0${_ec_s}"
+        _ec_s="0${_ec_s}"
       done
     fi
     _debug3 "_ec_r" "$_ec_r"