From gn help args:

"""
...
Examples
...
  gn args --list --args="os=\"android\" enable_doom_melon=true"
    Prints all arguments with the default values for a build with the
    given arguments set (which may affect the values of other
    arguments).
"""

but 

[994b8ad...]d:\src\cr3\src>gn args --list --args="os=\"android\" enable_doom_melon=true"
ERROR Exactly one build dir needed.
Usage: "gn args <out_dir>"
Or see "gn help args" for more variants.


It might be nice if this worked. Specifying a build dir always seems a bit tiring on the command line.

But otherwise, I guess we should just delete the --args helptext/example.