$ mutago  --dry-run ./ann
Per-mutator totals across all files:
  arithmetic/assign_invert                 1
  arithmetic/assignment                    1
  conditional/negated                      2
  expression/comparison                    2
  numbers/decrementer                      5
  numbers/incrementer                      5
  statement/remove                         2
  statement/return                         2

Total: 20 mutation(s) would be generated. No files written, no tests run.
$ mutago --config ign.yml --dry-run ./ann
Per-mutator totals across all files:
  conditional/negated                      2
  expression/comparison                    2
  numbers/decrementer                      4
  numbers/incrementer                      4
  statement/remove                         2
  statement/return                         2

Total: 16 mutation(s) would be generated. No files written, no tests run.