[dunecontrol]

alternative implementation for fix_variable_name,
avoiding invocation of tr

[[Imported from SVN: r6829]]

lib/dunemodules.lib

@@ -389,9 +389,7 @@ eval_control() {
 # $1 value
 #
 fix_variable_name() {
-  # The replacement sequence has to be extended explicitly to the length of
-  # the matching set for SunOS compatibility
-  echo -n "$@" | tr '[:punct:]' '[_*]'
+  echo ${@//[[:punct:]]/_}
 }
 
 #