Remove logs from test failure summary

[il3ven]

As per #2963 (comment), this amateur PR attempts to remove logs from the test failure summary. Closes #2963

Output before this PR

npx ava

  ✔ pass
  ✖ sum Test failed via `t.fail()`
    ℹ v14.18.2
  ─

  sum

    ℹ v14.18.2

  index.test.js:10

    9:   t.log(process.version);
   10:   t.fail()               
   11: });                      

  Test failed via `t.fail()`

  › index.test.js:10:5

  ─

  1 test failed

Output after this PR

npx ava                         

  ✔ pass
  ✖ sum Test failed via `t.fail()`
    ℹ v14.18.2
  ─

  sum
  index.test.js:10

    9:   t.log(process.version);
   10:   t.fail()               
   11: });                      

  Test failed via `t.fail()`

  › index.test.js:10:5

  ─

  1 test failed

[novemberborn]

How can I update the .log files for different node versions?

Using https://volta.sh/:

UPDATE_REPORTER_LOG=true volta run --node 12 npx tap test-tap/reporters/*

I've pushed those updates.

[novemberborn]

Looking at the diff, I think we need this empty line.

[il3ven]

I have added the empty line. According to the existing logic, an empty line will be added when there are no logs.

[novemberborn]

Thanks @il3ven!