Bug#1084833: lintian: uses-deprecated-python-stdlib misses indented imports

[Louis-Philippe Véronneau]

Package: lintian
Severity: normal

It seems the uses-deprecated-python-stdlib tag misses indented imports. 
A good example is the nova package:

https://sources.debian.org/src/nova/2%3A30.0.0-1/nova/virt/disk/api.py/#L44-L45

The error spawns from the regex starting with "^".

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  ⣾⠁⢠⠒⠀⣿⡁  Louis-Philippe Véronneau
  ⢿⡄⠘⠷⠚⠋   po...@debian.org / veronneau.org
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