Add test coverage for elided frames with leading whitespace (#138)

[yamaankhan20]

What does this PR do?

Adds missing test coverage for the elided frames parsing fix implemented in #138 by @homme.

The fix in #138 handles goroutine stack traces with elided frames that have leading whitespace (e.g., " ...23 frames elided..."), but didn't include a test case. This PR adds that missing test.

Changes

• Added test case: "elided frames with leading whitespaces"

Test plan

• All tests pass locally:
  • GODEBUG=tracebackancestors=10 go test ./... -count=1
  • go test ./internal/stack/... -run TestParseStack -v

Credits

• Original fix: @homme in fix: Handle leading whitespace in elided frames marker #138

Related

• Builds upon fix: Handle leading whitespace in elided frames marker #138

[CLAassistant]

All committers have signed the CLA.

[yamaankhan20]

@abhinav have a look at this PR

[abhinav]

Thanks, @yamaankhan20. LGTM.
CC @r-hang @JacobOaks

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (503ad8e) to head (512175b).

Additional details and impacted files

@@            Coverage Diff            @@
##            master      #157   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            5         5           
  Lines          265       266    +1     
=========================================
+ Hits           265       266    +1     

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