word wrap code blocks

[willmcgugan]

Fixes #1515

[codecov]

Codecov Report

Merging #1655 (29b5c93) into master (07c6733) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #1655   +/-   ##
=======================================
  Coverage   99.69%   99.69%           
=======================================
  Files          71       71           
  Lines        6862     6866    +4     
=======================================
+ Hits         6841     6845    +4     
  Misses         21       21           

Flag	Coverage Δ
unittests	99.69% <100.00%> (+<0.01%)	⬆️

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Impacted Files	Coverage Δ
rich/console.py	100.00% <ø> (ø)
rich/markdown.py	100.00% <ø> (ø)
rich/_log_render.py	100.00% <100.00%> (ø)
rich/logging.py	100.00% <100.00%> (ø)

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