Fix shellcheck warning SC2220 [skip ci]

Author: webmaster128

devtools/format_md.sh

@@ -6,7 +6,6 @@ command -v shellcheck >/dev/null && shellcheck "$0"
 op="write"
 while getopts c option; do
   case "${option}" in
-
   c) op="check" ;;
   *) ;;
   esac

devtools/format_sh.sh

@@ -6,8 +6,8 @@ command -v shellcheck >/dev/null && shellcheck "$0"
 op="w"
 while getopts c option; do
   case "${option}" in
-
   c) op="d" ;;
+  *) ;;
   esac
 done
 

devtools/format_yml.sh

@@ -6,8 +6,8 @@ command -v shellcheck >/dev/null && shellcheck "$0"
 op="write"
 while getopts c option; do
   case "${option}" in
-
   c) op="check" ;;
+  *) ;;
   esac
 done