Fix bin/pandoc-wrapper to use verge(1) - #237

The script needs to use verge(1) (see
https://github.com/xexyl/jparse/blob/master/verge.c) from the jparse
repo (see https://github.com/xexyl/jparse/).

NOTE: it is NOT recommended you install verge(1) from the jparse repo
for IOCCC related things. Instead run (the first line only if you don't
already have the mkiocccentry repo cloned and updated; if you have it
you might wish to pull the current release):

    git clone https://github.com/ioccc-src/mkiocccentry.git"
    cd mkiocccentry && make clobber all
    cd jparse && sudo make install clobber

This is because on a rare occasion the jparse repo can be ahead of the
mkiocccentry's jparse/ directory.

Tested with 'make markdown' (this is enough because it uses the
pandoc-wrapper.sh and it's also what triggered the bug for @SirWumpus in
NetBSD - which does not support sort -V).

In theory the script should work under NetBSD now.

bin/pandoc-wrapper.sh

@@ -20,6 +20,8 @@
 #
 # Copyright (c) 2023,2024 by Landon Curt Noll.  All Rights Reserved.
 #
+# .. with an important bug fix in November 2025 by Cody Boone Ferguson.
+#
 # Permission to use, copy, modify, and distribute this software and
 # its documentation for any purpose and without fee is hereby granted,
 # provided that the above copyright, this permission notice and text
@@ -143,6 +145,17 @@ if [[ $status -eq 0 ]]; then
     TOPDIR=$("$GIT_TOOL" rev-parse --show-toplevel)
 fi
 export TOPDIR
+#
+VERGE=$(type -P verge)
+export VERGE
+if [[ -z $VERGE ]]; then
+    echo "$0: FATAL: verge is not installed or not in \$PATH" 1>&2
+    echo "$0: notice: to install verge:" 1>&2
+    echo "$0: notice: run: git clone https://github.com/ioccc-src/mkiocccentry.git" 1>&2
+    echo "$0: notice: then: cd mkiocccentry && make clobber all" 1>&2
+    echo "$0: notice: then: cd jparse && sudo make install clobber" 1>&2
+    exit 5
+fi
 PANDOC_TOOL=$(type -P pandoc)
 export PANDOC_TOOL
 if [[ -z $PANDOC_TOOL ]]; then
@@ -428,9 +441,7 @@ fi
 
 # verify that the pandoc version is >= the minimum version
 #
-FIRST_VERSION=$(printf "%s\n%s" "$PANDOC_TOOL_VERSION" "$PANDOC_MIN_VERSION" | LC_ALL=C sort -V | head -1)
-export FIRST_VERSION
-if [[ $FIRST_VERSION != "$PANDOC_MIN_VERSION" ]]; then
+if ! "$VERGE" "$PANDOC_TOOL_VERSION" "$PANDOC_MIN_VERSION"; then
     echo "$0: ERROR: pandoc: $PANDOC_TOOL version: $PANDOC_TOOL_VERSION <=" \
 	 "minimum allowed: $PANDOC_MIN_VERSION" 1>&2
     echo "$0: Warning: pandoc version must be >= $PANDOC_MIN_VERSION" 1>&2
@@ -438,7 +449,6 @@ if [[ $FIRST_VERSION != "$PANDOC_MIN_VERSION" ]]; then
     exit 5
 fi
 
-
 # execute pandoc
 #
 if [[ -z $NOOP ]]; then