PHPOffice / PHPPresentation / 33717342196

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ODPresentation Reader : Read a paragraph's line spacing out of the line height (#980)

`loadStyle()` asks whether `fo:line-height` is there and then takes both the unit and the value out
of `fo:margin-bottom`. A line spacing therefore came back as the margin below the paragraph, cut to
an integer, and the mode always came back as points, because a margin is written in centimetres and
never in per cent.

`fo:margin-top` and `fo:margin-bottom` are written to six decimals rather than three: a point is
127/3600 cm, so three decimals lose about a seventieth of a point, and 11 points came back as
10.998425196850395. The two Writer tests that pinned the old three decimals now pin the six.

`Alignment::getLevel()` is lost as well and is left alone: a level lives in the nesting of
`text:list`, and a list is written only for a paragraph that carries a bullet, so a level on a plain
paragraph has nowhere to go. Where it should go is a decision rather than a fix.

6 of 6 new or added lines in 2 files covered. (100.0%)

11314 of 12024 relevant lines covered (94.1%)

71.22 hits per line