R1:c0c5b9bb645b

Add Edit All link to Differential revision

Summary:
Some text editors support opening multiple files at once.
I've used space as paths separator which may be compatible with some other
editors (I didn't tried any other though).
Note: This approach is incompatible with spaces in paths.
I am fine with changing it to anything else to support such paths or more
editors.
Probably the cleanest solution (yet still incompatible with most editors) would
be to use something like ##editor://open/?