Fix shell variable interpolation for prefix/postfix

Author: jbooth-ankored

parse_tool_versions.sh

@@ -4,9 +4,9 @@ while IFS= read -r line; do
   if [[ $line != \#* ]]; then
     NAME="$(echo "$line" | cut -d' ' -f1)"
     if [ -n "$PREFIX" ]; then
-      NAME="$PREFIX$NAME"
+      NAME="${PREFIX}${NAME}"
     elif [ -n "$POSTFIX" ]; then
-      NAME="$NAME$POSTFIX"
+      NAME="${NAME}${POSTFIX}"
     fi
     if [ "$UPPERCASE" == "true" ]; then NAME="$(echo "$NAME" | tr "[:lower:]" "[:upper:]")"; fi