Explain crontab entry in schedule command in plain English

[pilosus]

Closed #102

[codecov]

Codecov Report

Merging #103 (fce5dcd) into main (6f19103) will increase coverage by 0.12%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #103      +/-   ##
==========================================
+ Coverage   91.53%   91.65%   +0.12%     
==========================================
  Files          14       14              
  Lines        1217     1235      +18     
  Branches       64       64              
==========================================
+ Hits         1114     1132      +18     
  Misses         39       39              
  Partials       64       64              

Files Changed	Coverage Δ
src/dienstplan/commands.clj	99.48% <100.00%> (+0.01%)	⬆️
src/dienstplan/db.clj	92.00% <100.00%> (+0.11%)	⬆️
src/dienstplan/helpers.clj	100.00% <100.00%> (ø)
src/dienstplan/spec.clj	77.56% <100.00%> (ø)

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