space in between tree options causes error

[rpguiteras]

space in tree(status, prune) causes error

. statacons, tree(status, prune) dry_run
usage: scons [OPTIONS] [VARIABLES] [TARGETS]

SCons Error: `' is not a valid --tree option type, try:
    all, derived, prune, status, linedraw
Error from Python: 2
r(7103);

runs fine with tree(status,prune), i.e., without the space in the tree options

. statacons, tree(status,prune) dry_run
scons: Reading SConscript files ...
Using 'LabelsFormatsOnly' custom_datasignature.
Calculates timestamp-independent checksum of dataset, 
  including variable formats, variable labels and value labels.
Edit use_custom_datasignature in config_project.ini to change.
  (other options are Strict, DataOnly, False)
scons: done reading SConscript files.
scons: Building targets ...