fixed spellcheck and minor issues for release

helpers/prompt.sh

@@ -68,6 +68,7 @@ unset _pc_name
 _prompt_resolve_color()
 {
     local rest="$1" out="" name
+    # shellcheck disable=SC2016 # a regular expression, the $ must stay literal
     local ref_re='^\$(\{('"$_PROMPT_COLOR_RE"')\}|('"$_PROMPT_COLOR_RE"'))'
     local ansi_re='^(\\e|\\033)\[[0-9;]*m'
 
@@ -106,6 +107,7 @@ _prompt_theme_file()
 # Usage: _prompt_apply_overrides
 _prompt_apply_overrides()
 {
+    # shellcheck disable=SC2154 # CONF_prompt is filled by parse_conf (profile.sh)
     declare -p CONF_prompt >/dev/null 2>&1 || return 0
 
     local k