Enhancement: improve reading order

[christinestraub]

Is your feature request related to a problem? Please describe.

PDF: 124_PDFsam_Basel III - Finalising post-crisis reforms.pdf

elements = partition_pdf(
    filename="124_PDFsam_Basel III - Finalising post-crisis reforms.pdf",
    strategy="hi_res",
    infer_table_structure=True,
)

There are 2 cases of formulas appear at the beginning of the element for some reason:

= . % kRW 2 25 . Risk weights for both risk-free yield curve and inflation rate are set at
...
= kRW RW ⋅ 6 , where Risk weights for both interest rate and inflation volatilities are set to σRW is set at 55%. σ

Describe the solution you'd like
Merge with XY-cut, with a preference of walking horizontally instead of vertically like the current default.

Describe alternatives you've considered
Pre-process bboxes before merge to alter size to Y-axis is aligned for tiny differences.

Additional context

• Extracted elements by pdfminer