fix failing tests after new warning phrases for dupe rules

[BurnzZ]

Resolves #123

[codecov]

Codecov Report

Merging #125 (0f93efa) into master (4e2d850) will not change coverage.
The diff coverage is 0.00%.

❗ Current head 0f93efa differs from pull request most recent head 4ced013. Consider uploading reports for the commit 4ced013 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #125   +/-   ##
=======================================
  Coverage   88.87%   88.87%           
=======================================
  Files          14       14           
  Lines         737      737           
=======================================
  Hits          655      655           
  Misses         82       82           

Impacted Files	Coverage Δ
scrapy_poet/api.py	100.00% <ø> (ø)
scrapy_poet/commands.py	47.05% <0.00%> (ø)
scrapy_poet/downloadermiddlewares.py	100.00% <ø> (ø)
scrapy_poet/injection.py	98.97% <ø> (ø)
scrapy_poet/page_input_providers.py	94.91% <ø> (ø)

[kmike]

Thanks @BurnzZ!