fix: the ASCII whitespaces are preserved so can not be escaped

[JounQin]

This PR contains a:

• [x] bugfix
• [ ] new feature
• [ ] code refactor
• [ ] test update
• [ ] typo fix
• [ ] metadata update

Motivation / Use-Case

close #1626

Breaking Changes

N/A

Additional Info

related https://infra.spec.whatwg.org/#ascii-whitespace

cc @alexander-akait

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 96.28%. Comparing base (f5be49c) to head (902754f). Report is 48 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1632      +/-   ##
==========================================
+ Coverage   96.15%   96.28%   +0.12%     
==========================================
  Files          10       10              
  Lines        1196     1210      +14     
  Branches      461      465       +4     
==========================================
+ Hits         1150     1165      +15     
- Misses         37       40       +3     
+ Partials        9        5       -4     

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[JounQin]

@alexander-akait @snitin315 Any ETA to merge and release?

[alexander-akait]

@JounQin this week

[JounQin]

Friendly ping @alexander-akait @snitin315 @ersachin3112