gemrc typo

[pznamensky]

Just a small typo in #344

[hsbt]

No, It accepts with https://github.com/rubygems/rubygems/blob/master/lib/rubygems/s3_uri_signer.rb#L108.

[pznamensky]

Hmm, indeed it should work.
However, I've tried it and got an error:

root@ca87f49109a5:~# gem install my-gem --source s3://my-gem-us --version 0.0.27
ERROR:  Could not find a valid gem 'my-gem' (= 0.0.27), here is why:
          Unable to download data from s3://my-gem-us - no s3_source key exists in .gemrc (s3://my-gem-us)

root@ca87f49109a5:~# cat .gemrc
:sources:
- s3://my-gem-us
:s3_source:
  :my-gem-us:
    :provider: instance_profile

root@ca87f49109a5:/# gem --version
3.4.10

Setting s3_source: (without leading colons) works fine for some reason.