Fix simple typo: mutliple -> multiple

[timgates42]

Closes #115

[codecov-io]

Codecov Report

Merging #116 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #116   +/-   ##
=======================================
  Coverage   92.69%   92.69%           
=======================================
  Files          31       31           
  Lines        1259     1259           
=======================================
  Hits         1167     1167           
  Misses         92       92

Impacted Files	Coverage Δ
saws/completer.py	93.81% <ø> (ø)	⬆️

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