Fix doc test and remove to_string from examples

[jrmoulton]

No description provided.

[codecov]

Codecov Report

Merging #102 (f0280f9) into main (159b865) will decrease coverage by 0.23%.
Report is 28 commits behind head on main.
The diff coverage is 0.24%.

@@           Coverage Diff            @@
##            main    #102      +/-   ##
========================================
- Coverage   4.04%   3.81%   -0.23%     
========================================
  Files         45      50       +5     
  Lines       7833    8407     +574     
========================================
+ Hits         317     321       +4     
- Misses      7516    8086     +570     

Files Changed	Coverage Δ
reactive/src/memo.rs	0.00% <0.00%> (ø)
reactive/src/signal.rs	0.00% <0.00%> (ø)
reactive/src/trigger.rs	0.00% <0.00%> (ø)
src/action.rs	0.00% <0.00%> (ø)
src/animate/anim_id.rs	0.00% <ø> (ø)
src/app.rs	0.00% <0.00%> (ø)
src/app_handle.rs	0.00% <0.00%> (ø)
src/context.rs	0.00% <0.00%> (ø)
src/event.rs	0.00% <0.00%> (ø)
src/ext_event.rs	0.00% <0.00%> (ø)
... and 28 more

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