Keyword Frequency of a Binary File Must Be Undefined

[nuthanmunaiah]

Description

The keyword frequency metric of a binary file must be undefined. However, the implementation of the metric incorrectly returns {'new': 1}.

Demonstration

$ nameko shell
>>> n.rpc.keyword.collect(n.rpc.project.get('google', 'brotli'), '534072ad426a566dbe54f767686088f282ef4ffc', 'docs/brotli-comparison-study-2015-09-22.pdf')
{'new': 1}