fix(CodeBlocks): make highlight lines become selective

[sabertazimi]

issue #776

Pull Request

This PR Contains

• bugfix
• new feature
• code refactor
• test update
• typo fix
• metadata update

Motivation / Use-Case

Breaking Changes

Test-Case

I have verified these changes via:

• Code inspection only, or
• Newly added/modified unit tests, or
• No unit tests but ran on a real repository, or
• Both unit tests + ran on a real repository

Additional Info

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Name	Status	Preview	Updated
blog	✅ Ready (Inspect)	Visit Preview	May 3, 2022 at 0:29AM (UTC)

[pull-request-quantifier-deprecated]

This PR has 34 quantified lines of changes. In general, a change size of upto 200 lines is ideal for the best PR experience!

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Quantification details

Label      : Extra Small
Size       : +18 -16
Percentile : 13.6%

Total files changed: 8

Change summary by file extension:
.css : +8 -8
.tsx : +10 -8
.snap : +0 -0

Change counts above are quantified counts, based on the PullRequestQuantifier customizations.

Why proper sizing of changes matters

Optimal pull request sizes drive a better predictable PR flow as they strike a
balance between between PR complexity and PR review overhead. PRs within the
optimal size (typical small, or medium sized PRs) mean:

• Fast and predictable releases to production:
  • Optimal size changes are more likely to be reviewed faster with fewer
    iterations.
  • Similarity in low PR complexity drives similar review times.
• Review quality is likely higher as complexity is lower:
  • Bugs are more likely to be detected.
  • Code inconsistencies are more likely to be detetcted.
• Knowledge sharing is improved within the participants:
  • Small portions can be assimilated better.
• Better engineering practices are exercised:
  • Solving big problems by dividing them in well contained, smaller problems.
  • Exercising separation of concerns within the code changes.

What can I do to optimize my changes

• Use the PullRequestQuantifier to quantify your PR accurately
  • Create a context profile for your repo using the context generator
  • Exclude files that are not necessary to be reviewed or do not increase the review complexity. Example: Autogenerated code, docs, project IDE setting files, binaries, etc. Check out the Excluded section from your prquantifier.yaml context profile.
  • Understand your typical change complexity, drive towards the desired complexity by adjusting the label mapping in your prquantifier.yaml context profile.
  • Only use the labels that matter to you, see context specification to customize your prquantifier.yaml context profile.
• Change your engineering behaviors
  • For PRs that fall outside of the desired spectrum, review the details and check if:
    • Your PR could be split in smaller, self-contained PRs instead
    • Your PR only solves one particular issue. (For example, don't refactor and code new features in the same PR).

How to interpret the change counts in git diff output

• One line was added: +1 -0
• One line was deleted: +0 -1
• One line was modified: +1 -1 (git diff doesn't know about modified, it will
  interpret that line like one addition plus one deletion)
• Change percentiles: Change characteristics (addition, deletion, modification)
  of this PR in relation to all other PRs within the repository.

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[codecov]

Codecov Report

Merging #786 (6cb8451) into main (501ef50) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #786   +/-   ##
=======================================
  Coverage   99.55%   99.55%           
=======================================
  Files         168      168           
  Lines         908      908           
  Branches       82       82           
=======================================
  Hits          904      904           
  Misses          4        4           

Impacted Files	Coverage Δ
components/CodeBlocks/Pre.tsx	100.00% <ø> (ø)
components/CodeBlocks/BlockCode.tsx	100.00% <100.00%> (ø)
components/CodeBlocks/LiveCode.tsx	100.00% <100.00%> (ø)

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