docs: add examples to normalization functions

[alandefreitas]

fix #929

In passing: remove non-existent @tparam N: #928

[cppalliance-bot]

An automated preview of the documentation is available at https://965.url.prtest2.cppalliance.org/index.html

If more commits are pushed to the pull request, the docs will rebuild at the same URL.

2026-01-23 17:40:19 UTC

[cppalliance-bot]

GCOVR code coverage report https://965.url.prtest2.cppalliance.org/gcovr/index.html
LCOV code coverage report https://965.url.prtest2.cppalliance.org/genhtml/index.html
Coverage Diff Report (in development) https://965.url.prtest2.cppalliance.org/diff-report/index.html

Build time: 2026-01-23 20:28:11 UTC

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.35%. Comparing base (f4a8008) to head (cfbd4ce).
⚠️ Report is 2 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #965   +/-   ##
========================================
  Coverage    99.35%   99.35%           
========================================
  Files          161      161           
  Lines         8770     8771    +1     
========================================
+ Hits          8713     8714    +1     
  Misses          57       57           

Files with missing lines	Coverage Δ
example/router/router.hpp	100.00% <ø> (ø)
include/boost/url/url_base.hpp	100.00% <ø> (ø)

... and 1 file with indirect coverage changes

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