pdfminer's base do_Tj delegates to self.do_TJ([s]), which already
dispatches to the overridden do_TJ. The do_Tj override was patching
the same char range a second time.

Repro (add print traces to do_TJ/do_Tj, run against any PDF):

    from unstructured.partition.pdf_image.pdfminer_utils import open_pdfminer_pages_generator

    with open("example-docs/pdf/reliance.pdf", "rb") as f:
        for page, layout in open_pdfminer_pages_generator(f):
            break

Before this fix, every Tj op produces two patch calls with the same
start index:

    [TRACE] do_TJ patching from 9
    [TRACE] do_Tj patching from 9   <- redundant