d\bde\be-\b-i\bin\bnf\bfi\bin\bni\bit\bte\be - inifinte recursion in a user-defined macro
D\bDE\bES\bSC\bCR\bRI\bIP\bPT\bTI\bIO\bON\bN
- initial text [$1 $1] middle text final text
+ initial text [$1 end] [middle end] middle text final text
-OpenBSD July 4, 2017 OpenBSD
+OpenBSD August 23, 2018 OpenBSD