add HTML phase 20-22 to readme2index.sh, improve inc/gen-author.sh,

Add code to `readme2index.sh` to implement HTML phases 20, 21 and 22.

Improve `inc/gen-author.sh` to put blank lines around
the pandoc tool output.

Changed `inc/gen-author.sh` VERSION from "1.1 2024-01-01"
to "1.2 2024-01-04".

inc/gen-author.sh

@@ -56,7 +56,7 @@ shopt -s globstar	# enable ** to match all files and zero or more directories an
 
 # set variables referenced in the usage message
 #
-export VERSION="1.1 2024-01-01"
+export VERSION="1.2 2024-01-04"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -665,7 +665,6 @@ fi
 # write author header to temporary markdown file
 #
 {
-    echo "<!-- START: this line starts content generated by: inc/$NAME -->"
     AUTHOR_COUNT=$(echo "$AUTHOR_HANDLE_SET" | wc -l)
     if [[ $AUTHOR_COUNT -gt 1 ]]; then
 	echo '<a name="author">**Authors:**</a>'
@@ -714,6 +713,7 @@ for author_handle in $AUTHOR_HANDLE_SET; do
 	if [[ $LOCATION_CODE == null ]]; then
 	    echo "Location: [unknown](/location.html#$LOCATION_CODE)"
 	else
+
 	    echo "Location: [$LOCATION_CODE](/location.html#$LOCATION_CODE)"
 	fi
 	echo
@@ -726,21 +726,11 @@ for author_handle in $AUTHOR_HANDLE_SET; do
     fi
 done
 
-# write END line
-#
-{
-    echo "<!-- END: next line ends content generated by: inc/$NAME -->"
-} | if [[ -z $NOOP ]]; then
-    cat >> "$TMP_FILE"
-elif [[ $V_FLAG -ge 3 ]]; then
-    sed -e "s;^;$0: debug[3]: -n disabled write: ;" 1>&2
-else
-    cat >> /dev/null
-fi
-
 # convert temporary markdown file into HTML
 #
 if [[ -z $NOOP ]]; then
+    echo "<!-- START: this line starts content generated by: inc/$NAME -->"
+    echo
     if [[ $V_FLAG -ge 1 ]]; then
 	echo  "$0: debug[1]: about to execute: $PANDOC_WRAPPER -P \"$PANDOC_WRAPPER_OPTSTR\" $TMP_FILE -" 1>&2
     fi
@@ -750,6 +740,8 @@ if [[ -z $NOOP ]]; then
 	echo "$0: ERROR: pandoc failed, error: $status" 1>&2
 	exit 218
     fi
+    echo
+    echo "<!-- END: next line ends content generated by: inc/$NAME -->"
 elif [[ $V_FLAG -ge 1 ]]; then
     echo  "$0: debug[1]: -n disabled execution of: $PANDOC_WRAPPER -P \"$PANDOC_WRAPPER_OPTSTR\" $TMP_FILE -" 1>&2
 fi