Support all alignment modes in regex matching & partial doc matching

[percevalw]

Description

Fixes #201

Checklist

• [x] If this PR is a bug fix, the bug is documented in the test suite.
• [x] Changes were documented in the changelog (pending section).
• [x] If necessary, changes were made to the documentation (eg new pipeline).

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (ddd1691) 96.51% compared to head (fbfa793) 96.56%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #230 +/- ## ========================================== + Coverage 96.51% 96.56% +0.05% ========================================== Files 254 255 +1 Lines 8372 8387 +15 ========================================== + Hits 8080 8099 +19 + Misses 292 288 -4 ```

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