Fix diff output

[Philmod]

Now:

== Comparing pip list --format=freeze ==
aiobotocore==1.2.2                                            | aiobotocore==1.3.0
aiohttp==3.7.3                                                | aiohttp==3.7.4
allennlp==2.2.0                                               | allennlp==2.3.0
arrow==0.17.0                                                 | arrow==1.0.3
astropy==4.2                                                  <

Before:

== Comparing pip freeze ==
aiobotocore==1.2.2					      |	aiobotocore==1.3.0
aiohttp @ file:///home/conda/feedstock_root/build_artifacts/a |	aiohttp @ file:///home/conda/feedstock_root/build_artifacts/a
allennlp==2.2.0						      |	allennlp==2.3.0
arrow @ file:///home/conda/feedstock_root/build_artifacts/arr |	arrow @ file:///home/conda/feedstock_root/build_artifacts/arr
astropy @ file:///home/conda/feedstock_root/build_artifacts/a <

http://b/178087631