Updates the docsstring of the tor function in _torontonian.py

[nquesada]

Updates docstring of tor.

[codecov]

Codecov Report

Merging #265 (1a72f75) into master (ab5b645) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master      #265   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           21        21           
  Lines         1385      1381    -4     
=========================================
- Hits          1385      1381    -4     

Impacted Files	Coverage Δ
thewalrus/_torontonian.py	100.00% <ø> (ø)

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