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In the ‘Floating to the top/bottom: top, bottom, snap’ section is the sentence: Each page float has a natural column, which is the column where the element would have started to appears it it was not a float. The first “it” is presumably a typo for “if”. In which case the “was” should also be “were” (subjunctive).
The following sentence is: Also, each page float has a natural page, which is the page where the element would have started if the was not a float. “if the” probably should be “if it”, and again “was” should be “were”. And the sentence after that is: Unless other constrained by lack of space or other float-* properties, page floats should appear in their natural column on the natural page. “other” probably should be “otherwise”, and “the natural page” as “their natural page”. (Next time I'll try to finish reading the whole paragraph before submitting the bug!)