Add bash line editor.

.local/share/blesh/contrib/config/github296-named-execmark.bash

@@ -0,0 +1,21 @@
+# blesh/contrib/config/github296-named-execmark.bash (C) 2023, Koichi Murase <myoga.murase@gmail.com>
+
+function ble/contrib/config:github296/named-execmark.hook {
+  local lastexit=$? command=$1
+
+  if ((lastexit)) && ! ble/string#match "$command" $'^[[:blank:]]*#[^\n]+$'; then
+    local sgr=$'\e[;94m' sgr0=$'\e[m' sgrE=$'\e[;91m' ret
+    ble/color/face2sgr-ansi varname_number; local sgrN=$ret
+
+    local exit=$lastexit name=
+    if ((exit>=128)) && [[ ${name:=${_ble_builtin_trap_sig_name[exit&127]}} ]]; then
+      exit=$'\e[1m'"$name"$'\e[22m'" ($sgrN$exit$sgrE)"
+    else
+      exit="exit $sgrN$exit$sgrE"
+    fi
+    local mark=$sgrE'[ble: '$exit']'$sgr0
+    ble/util/buffer.print "$mark"
+  fi
+}
+bleopt exec_errexit_mark=
+blehook POSTEXEC!=ble/contrib/config:github296/named-execmark.hook