diff --git a/xml/best-match.sh b/xml/best-match.sh
index 6d9ffb7219..8271274eb2 100755
--- a/xml/best-match.sh
+++ b/xml/best-match.sh
@@ -1,46 +1,46 @@
 #!/bin/sh
 
 base=$1; shift
 target=$1; shift
 destination=$1; shift
 prefix=$1; shift
 
 best="0.0"
-candidates=$(ls -1 ${base}-*.rng 2>/dev/null)
-for rng in $candidates; do
-    case $rng in
-	${base}-${target}.rng)
-	    best=${target}
-	    break
-	    ;;
-	*next*)
-	    : skipping $rng
-	    ;;
-	*) 
-	    v=$(echo $rng | sed -e "s/${base}-//" -e 's/.rng//')
-	    : comparing $v with $target
+candidates=$(ls -1 "${base}"-*.rng 2>/dev/null)
+for rng in ${candidates}; do
+    case ${rng} in
+        ${base}-${target}.rng)
+            best=${target}
+            break
+            ;;
+        *next*)
+            : skipping ${rng}
+            ;;
+        *)
+            v=$(echo ${rng} | sed -e "s/${base}-//" -e 's/.rng//')
+            : comparing ${v} with ${target}
 
-		echo | awk -v n1="$v" -v n2="${best}"  '{if (n1>n2) printf ("true"); else printf ("false");}' |  grep -q "true"
-	    if [ $? -eq 0 ]; then
-		: $v beats the previous ${best} for $target
-		if [ ${target} = next ]; then
-		    best=$v
-		else
-			echo | awk -v n1="$v" -v n2="${target}"  '{if (n1<n2) printf ("true"); else printf ("false");}' |  grep -q "true"
-		    if [ $? -eq 0 ]; then
-			: $v is still less than $target, using
-			best=$v
-		    fi
-		fi
-	    fi
-	    ;;
+            echo | awk -v n1="${v}" -v n2="${best}" '{if (n1>n2) printf ("true"); else printf ("false");}' |  grep -q "true"
+            if [ $? -eq 0 ]; then
+                : ${v} beats the previous ${best} for ${target}
+                if [ "${target}" = "next" ]; then
+                    best=${v}
+                else
+                    echo | awk -v n1="${v}" -v n2="${target}" '{if (n1<n2) printf ("true"); else printf ("false");}' |  grep -q "true"
+                    if [ $? -eq 0 ]; then
+                        : ${v} is still less than ${target}, using
+                        best=${v}
+                    fi
+                fi
+            fi
+            ;;
     esac
 done
 
-if [ "x${best}" != "x0.0" ]; then
-    if [ "x$destination" = x ]; then
-	echo ${base}-${best}.rng
+if [ "${best}" != "0.0" ]; then
+    if [ "x${destination}" = "x" ]; then
+        echo "${base}-${best}.rng"
     else
-	echo "$prefix<externalRef href=\"${base}-${best}.rng\"/>" >> ${destination}
+        echo "${prefix}<externalRef href=\"${base}-${best}.rng\"/>" >> "${destination}"
     fi
 fi