Fix escaping trailing backslash

[willmcgugan]

Fixes #2987

[codecov-commenter]

Codecov Report

Patch coverage: 95.12% and project coverage change: -0.03% ⚠️

Comparison is base (31c1fb6) 98.31% compared to head (58f54ca) 98.29%.
Report is 13 commits behind head on master.

❗ Your organization is not using the GitHub App Integration. As a result you may experience degraded service beginning May 15th. Please install the Github App Integration for your organization. Read more.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3063      +/-   ##
==========================================
- Coverage   98.31%   98.29%   -0.03%     
==========================================
  Files          74       74              
  Lines        8016     8038      +22     
==========================================
+ Hits         7881     7901      +20     
- Misses        135      137       +2     

Flag	Coverage Δ
unittests	98.29% <95.12%> (-0.03%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
rich/console.py	98.04% <ø> (ø)
rich/text.py	99.17% <94.73%> (-0.32%)	⬇️
rich/markup.py	100.00% <100.00%> (ø)
rich/progress.py	92.92% <100.00%> (ø)

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.