Print usage when running cli without arguments #52
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Includes test.
Codecov Report
@@ Coverage Diff @@
## main #52 +/- ##
==========================================
+ Coverage 85.23% 85.35% +0.11%
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Files 13 13
Lines 630 635 +5
==========================================
+ Hits 537 542 +5
Misses 93 93
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Related Issue(s): #51
Description: Checks to see if there's no command and, if so, prints usage. I don't error (contra the original issue) because I don't feel like a naked invocation is an error, but if others feel differently I'm happy to change.
PR Checklist: