Errant

Fix arbitrary reordering of edits with the same start and end span; e.g.
S I am happy .
A 2 2|||M:ADV|||really|||REQUIRED|||-NONE-|||0
A 2 2|||M:ADV|||very|||REQUIRED|||-NONE-|||0

VS.

S I am happy .
A 2 2|||M:ADV|||very|||REQUIRED|||-NONE-|||0
A 2 2|||M:ADV|||really|||REQUIRED|||-NONE-|||0

Added support for multiple annotators in `parallel_to_m2.py`.
Before: `python3 parallel_to_m2.py -orig <orig_file> -cor <cor_file> -out <out_file>`
After: `python3 parallel_to_m2.py -orig <orig_file> -cor <cor_file1> [<cor_file2> ...] -out <out_file>`
This is helpful if you have multiple annotations for the same orig file.

News (17-12-17)

In November, spaCy changed significantly when it became version 2.0.0. Although we have not tested ERRANT with this new version, the main change seemed to be a slight increase in performance (pos tagging and parsing etc.) at a significant cost to speed. Consequently, we still recommend spaCy 1.9.0 for use with ERRANT.

ERRANT would sometimes run into memory problems if sentences were long and very different. We hence changed the default alignment from breadth-first to depth-first. This bypassed the memory problems, made ERRANT faster and barely affected results.

ERRANT v1.0 released.