fix: cannot download differentially because of space in range

[beyondkmp]

fix #9270

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electron-updater	Patch

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[beyondkmp]

@mmaietta differentialUpdateTest keeps failing, and it seems the test server no longer supports this configuration.

[mmaietta]

the test server no longer supports this configuration.

What do you mean by this? If the current test server doesn't accept the new differential range format, doesn't that signify this change is not backward compatible?

[cubimon]

I tried to understand how differentialUpdateTest.ts works, but I have no idea how it works and where exactly it fails and why it is not compatible

[beyondkmp]

I haven't found where this update server is yet. I haven't found it.

[beyondkmp]

@mmaietta I've found the reason for the UT failure; it's because we used the 'ran' server（https://github.com/m3ng9i/ran/tree/master/server）, which doesn't support ranges without spaces. It seems the server didn't handle this case properly. According to RFC 7233, it should support both cases: with and without spaces.

[mmaietta]

Do we need to update ran then for supporting both formats per RFC 7233? Will that suffice or do we need a new command-line server for executing this workflow (and a few others that use ran)