better variable parsing

spells/menu/bitcoin/configure-bitcoin

@@ -45,7 +45,7 @@ modify_bitcoin_conf() {
     local key=$1
     local value=$2
     printf "%s\n" >> "$bitcoin_conf" # Ensure a newline exists at the end of the file
-    awk -v key="$key" -v value="$value" 'BEGIN {found=0} !/^#/ && $1==key {found=1; print key"="value; next} {print} END {if (!found) print key"="value}' "$bitcoin_conf" > "$bitcoin_conf.tmp" && mv "$bitcoin_conf.tmp" "$bitcoin_conf" || retry_with_sudo mv "$bitcoin_conf.tmp" "$bitcoin_conf"
+    awk -v key="$key" -v value="$value" 'BEGIN {OFS=FS="="; found=0} {gsub(/^[ \t]+|[ \t]+$/, "", $1)} !/^#/ && $1==key {found=1; print key"="value; next} {print $1"="$2} END {if (!found) print key"="value}' "$bitcoin_conf" > "$bitcoin_conf.tmp" && mv "$bitcoin_conf.tmp" "$bitcoin_conf" || retry_with_sudo mv "$bitcoin_conf.tmp" "$bitcoin_conf"
     awk '/./' "$bitcoin_conf" > "$bitcoin_conf.tmp" && mv "$bitcoin_conf.tmp" "$bitcoin_conf" || retry_with_sudo mv "$bitcoin_conf.tmp" "$bitcoin_conf" # Remove trailing newlines
 }