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Additional Information

Competing Interests

Oscar Nierstrasz is an Academic Editor for PeerJ Computer Science.

Author Contributions

Niko Schwarz conceived and designed the experiments, performed the experiments, analyzed the data, wrote the paper, performed the computation work, reviewed drafts of the paper.

Aaron Karper conceived and designed the experiments, performed the experiments, analyzed the data, wrote the paper, prepared figures and/or tables, performed the computation work, reviewed drafts of the paper.

Oscar Nierstrasz wrote the paper, reviewed drafts of the paper.

Data Deposition

The following information was supplied regarding the deposition of related data:

https://github.com/nes1983/tree-regex

Funding

Niko Schwarz was funded by the Swiss National Science Foundation and the University of Bern. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.


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