expect, jest-matcher-utils: Display change counts in annotation lines

[pedrottimark]

Summary

In the printDiffOrStringify function, add includeChangeCounts option to calls:

• diffStringsUnified
• diffDefault

For consistency with #8982 to interpret differences when other assertions fail

Residue

Did not add includeChangeCounts option:

• to spy matchers because not separate annotations for multiple diffs per call
• to diff named export from jest-matcher-utils but caller can add it

I noticed something brittle about a few snapshots of matcher errors which contain diffs: when I tested with --expand option to see all of the lines in the snapshot to count changes, it affected the matcher, which is not correct.

Test plan

Updated 76 snapshots

The differences between empty and non-empty map or object are example where change counts would be even clearer in a data-driven-diff

	package	test file
1	e2e	failures
4	expect	extend
66	expect	matchers
2	expect	toThrowMatchers
1	jest-matcher-utils	index
2	jest-matcher-utils	printDiffOrStringify

See also pictures in following comment: baseline is at left and improved is at right

[pedrottimark]

toBe string: change 1 line

toEqual object: insert 2 lines

toHaveProperty element: change 1 line

toMatchObject object: delete 2 lines and change 1 line

Analysis of the preceding example might decide whether it is progress or regress to change from polyline with stroke to polygon with fill

toStrictEqual instance: change 1 line (that is, the data type)

[codecov-io]

Codecov Report

Merging #9035 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master    #9035   +/-   ##
=======================================
  Coverage   64.05%   64.05%           
=======================================
  Files         277      277           
  Lines       11676    11676           
  Branches     2863     2863           
=======================================
  Hits         7479     7479           
  Misses       3572     3572           
  Partials      625      625

Impacted Files	Coverage Δ
packages/jest-matcher-utils/src/index.ts	83.22% <100%> (ø)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update f15ada4...8f9249d. Read the comment docs.

[github-actions]

This pull request has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.
Please note this issue tracker is not a help forum. We recommend using StackOverflow or our discord channel for questions.