Kraken report results in file name collisions due to over-zealous suffix removal

[jfy133]

Check Documentation

I have checked the following places for your error:

• nf-core website: troubleshooting
• nf-core/eager pipeline documentation
  - nf-core/eager FAQ/troubleshooting can be found here

Description of the bug

Error executing process > 'multiqc (1)'

Caused by:
  Process `multiqc` input file name collision -- There are multiple input files for each of the following file names: kraken/EMN001.kraken2_report

due to

eager/main.nf

Line 2980 in 4c382d5

prefix = fastq.toString().tokenize('.')[0]

taking only the first element of a split by . process.

Steps to reproduce

Two samples in TSV with name such as

EMN001.A0101
EMN001.A0102

Expected behaviour

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