cleanup docstrings & imports

[RussTorres]

updating docstrings and imports

[pep8speaks]

Hello @RussTorres! Thanks for opening this PR. We checked the lines you've touched for PEP 8 issues, and found:

• In the file em_stitch/lens_correction/lens_correction_solver.py:

Line 145:80: E501 line too long (84 > 79 characters)
Line 211:80: E501 line too long (80 > 79 characters)

• In the file em_stitch/lens_correction/utils.py:

Line 17:80: E501 line too long (83 > 79 characters)
Line 44:80: E501 line too long (80 > 79 characters)

• In the file em_stitch/montage/montage_solver.py:

Line 220:80: E501 line too long (83 > 79 characters)

• In the file em_stitch/plots/montage_plots.py:

Line 65:80: E501 line too long (84 > 79 characters)

[github-actions]

Test Results

 3 files  ±0   3 suites  ±0   4m 26s ⏱️ ±0s
20 tests ±0  20 ✅ ±0  0 💤 ±0  0 ❌ ±0 
60 runs  ±0  60 ✅ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit 072923f. ± Comparison against base commit 18193c2.