Providing users with a copy-to-clipboard feature for the checksum

[robbyrussell]

When viewing an individual Rubygem version, let's make it simple for users to copy/paste the SHA 256 Checksum quickly. This change uses the existing copy/clipboard functionality.

Currently, it looks like this:

Proposed change:

Thanks for your consideration!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (866208a) 96.98% compared to head (3e7bbef) 96.98%.
Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #4353   +/-   ##
=======================================
  Coverage   96.98%   96.98%           
=======================================
  Files         336      336           
  Lines        7487     7487           
=======================================
  Hits         7261     7261           
  Misses        226      226           

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[simi]

Hello @robbyrussell, it seems those I18n keys are not present in the given scope. Instead of another copy, I did small refactoring at #4354 which makes them reusable. Once merged, you can change it to t("copied") or similar to fix failing tests in here.

[simi]

@robbyrussell #4354 got merged, can you update templates?

[robbyrussell]

@simi sure thing, done!

[simi]

@robbyrussell would you mind to fix the failing spec?

rubygems.org/test/functional/versions_controller_test.rb

Line 139 in 8c47cf5

assert page.has_content?(@latest_version.sha256_hex)

It expects sha to be printed in the page content, but since it is now part of input, it fails the test. Feel free to ping me if you need help, I can try to tackle this on my own.