repl: fix dedup comparing normalized line against raw history

[watilde]

This ensures consistency in how the REPL history handles duplicate entries.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.62%. Comparing base (3a53447) to head (af5530a).
⚠️ Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #62886      +/-   ##
==========================================
+ Coverage   89.60%   89.62%   +0.02%     
==========================================
  Files         706      706              
  Lines      219179   219179              
  Branches    41993    41992       -1     
==========================================
+ Hits       196400   196444      +44     
+ Misses      14675    14628      -47     
- Partials     8104     8107       +3     

Files with missing lines	Coverage Δ
lib/internal/repl/history.js	93.62% <100.00%> (ø)

... and 34 files with indirect coverage changes

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