[zsh] minor edits

zsh/env.zsh

@@ -31,3 +31,5 @@ export JQ_COLORS="${(j.:.)jq_colors}"
 unset jq_colors
 
 export FZF_DEFAULT_OPTS='--preview-window=sharp'
+
+export HOMEBREW_NO_AUTO_UPDATE=1

zsh/zplg.zsh

@@ -393,7 +393,12 @@ plugin() {
       return 1
     fi
 
-    local value; for value in "$plugin_dir/"${^@}; do
+    local value; for value in "$@"; do
+      if [[ -z "$value" ]]; then
+        value="${plugin_dir}"
+      else
+        value="${plugin_dir}/${value}"
+      fi
       if eval "(( \${${var_name}[(ie)\$value]} > \${#${var_name}} ))"; then
         case "$operator" in
           prepend) eval "$var_name=(\"\$value\" \${$var_name[@]})" ;;