almost fix return 0

lib/ansi.bash

@@ -26,14 +26,14 @@ FG_COLORS[GRAY]='\e[90m'
 FG_COLORS[MAGENTA]='\e[95m'
 
 declare -A BG_COLORS
-BG_COLORS["BLACK"]='\e[40m'
-BG_COLORS["RED"]='\e[41m'
-BG_COLORS["GREEN"]='\e[42m'
-BG_COLORS["YELLOW"]='\e[43m'
-BG_COLORS["BLUE"]='\e[44m'
-BG_COLORS["PURPLE"]='\e[45m'
-BG_COLORS["CYAN"]='\e[46m'
-BG_COLORS["WHITE"]='\e[47m'
+BG_COLORS[BLACK]='\e[40m'
+BG_COLORS[RED]='\e[41m'
+BG_COLORS[GREEN]='\e[42m'
+BG_COLORS[YELLOW]='\e[43m'
+BG_COLORS[BLUE]='\e[44m'
+BG_COLORS[PURPLE]='\e[45m'
+BG_COLORS[CYAN]='\e[46m'
+BG_COLORS[WHITE]='\e[47m'
 # BG_COLORS["GRAY"]='\e[90m'
 # BG_COLORS["MAGENTA"]='\e[95m'
 
@@ -59,7 +59,6 @@ function style_padding {
   style_ansi "$left"
 
   style_ansi "$1"
-  # builtin echo -n "$1"
 
   right=$(for _ in $(seq 1 "${padding_right}"); do builtin echo -n ' '; done)
   style_ansi "$right"
@@ -75,9 +74,7 @@ function _style_variant {
 
 function _style_bg {
   if [[ -n "$1" ]]; then
-    [[ -v BG_COLORS[$1] ]] && echo "${BG_COLORS[$1]}" && return
-    >&2 echo "unknown BG value: $1" && return 1
-    # false
+    [[ -v BG_COLORS[$1] ]] && echo "${BG_COLORS[$1]}" || >&2 echo "unknown BG value: $1"
   fi
 }
 
@@ -93,6 +90,7 @@ function style_ansi {
 
 function style_block {
   local content length top bottom i
+
   content=$(style_padding "$1")
   length=$(ansi_length "$content")