Use bound URL in doc examples (closes #478)

[shalvah]

No description provided.

[codecov-io]

Codecov Report

Merging #500 into master will increase coverage by 0.03%.
The diff coverage is 100%.

@@             Coverage Diff              @@
##             master     #500      +/-   ##
============================================
+ Coverage     92.28%   92.32%   +0.03%     
- Complexity      255      256       +1     
============================================
  Files            12       13       +1     
  Lines           596      599       +3     
============================================
+ Hits            550      553       +3     
  Misses           46       46

Impacted Files	Coverage Δ	Complexity Δ
src/Tools/Utils.php	100% <100%> (ø)	4 <4> (?)
.../Tools/ResponseStrategies/ResponseCallStrategy.php	93.16% <100%> (-0.44%)	40 <0> (-3)
src/Tools/Generator.php	95.12% <100%> (+0.02%)	72 <0> (ø)	⬇️

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