Address shellcheck warnings

lib/commands/command-help

@@ -17,7 +17,8 @@ EOF
 asdf_extension_cmds() {
   local plugins_path ext_cmds
   plugins_path="$(get_plugin_path)"
-  # shellcheck disable=SC2012 # use find instead of ls -1
+  # use find instead of ls -1
+  # shellcheck disable=SC2012
   ext_cmds="$(ls -1 "$plugins_path"/*/bin/command* 2>/dev/null | sed "s#$plugins_path/#  asdf #;"'s#/bin/command##g;s#-# #g')"
   if test -n "$ext_cmds"; then
     echo "$ext_cmds" | cut -d' ' -f 4 | uniq | while read -r plugin; do

lib/commands/command-latest

@@ -10,7 +10,7 @@ latest_command() {
 
   # pattern from xxenv-latest (https://github.com/momo-lab/xxenv-latest)
   asdf list-all "$plugin_name" "$query" |
-    grep -vE "(^Available versions:|-src|-dev|-latest|-stm|[-\.]rc|-alpha|-beta|[-\.]pre|-next|(a|b|c)[0-9]+|snapshot|master)" |
+    grep -vE "(^Available versions:|-src|-dev|-latest|-stm|[-\\.]rc|-alpha|-beta|[-\\.]pre|-next|(a|b|c)[0-9]+|snapshot|master)" |
     sed 's/^\s\+//' |
     sort --version-sort |
     tail -1

lib/commands/command-list-all

@@ -13,7 +13,7 @@ list_all_command() {
   if [[ $query ]]; then
     versions=$(echo "$versions" |
       tr ' ' '\n' |
-      grep -E "^\s*$query" |
+      grep -E "^\\s*$query" |
       tr '\n' ' ')
   fi