Add another example to exception condition documentation

[gregg-miskelly]

This adds another example to the exception condition documentation to hopefully clarify a question that @vchirikov raised.

[codecov]

Codecov Report

Merging #4505 (e2a0368) into master (b2c8deb) will decrease coverage by 0.16%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4505      +/-   ##
==========================================
- Coverage   69.08%   68.92%   -0.17%     
==========================================
  Files         109      109              
  Lines        4325     4325              
  Branches      756      756              
==========================================
- Hits         2988     2981       -7     
- Misses       1140     1148       +8     
+ Partials      197      196       -1     

Flag	Coverage Δ
integration	52.21% <ø> (-0.20%)	⬇️
unit	84.14% <ø> (ø)

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Impacted Files	Coverage Δ
src/omnisharp/fileOperationsResponseEditBuilder.ts	61.53% <0.00%> (-23.08%)	⬇️
src/features/semanticTokensProvider.ts	82.00% <0.00%> (-4.00%)	⬇️
src/features/codeLensProvider.ts	53.24% <0.00%> (-1.30%)	⬇️
src/features/diagnosticsProvider.ts	83.33% <0.00%> (+1.85%)	⬆️

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