Refactor TraceState's __toString method #727 Span Attributes Documentation#704

[amber0612]

#727
#704

[codecov]

Codecov Report

Merging #729 (90865ed) into main (5c3109a) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##               main     #729      +/-   ##
============================================
- Coverage     82.65%   82.63%   -0.02%     
- Complexity     1271     1272       +1     
============================================
  Files           145      145              
  Lines          3124     3121       -3     
============================================
- Hits           2582     2579       -3     
  Misses          542      542              

Flag	Coverage Δ
7.4	82.63% <100.00%> (-0.02%)	⬇️
8.0	82.69% <100.00%> (-0.02%)	⬇️
8.1	82.69% <100.00%> (-0.02%)	⬇️

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Impacted Files	Coverage Δ
src/API/Trace/TraceState.php	100.00% <100.00%> (ø)

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