[pyxl] Small tutorial PDF patch(es?)

[John Yeung]

On page 14 (regarding error_text_from_code):

s/function/dictionary/

A less simple but probably more important fix would be doing something
about the row height information on page 33. It currently states:

"Do not be fooled by the height attribute of the Row class, it does
nothing. Specify a style on the row and set its font height attribute
instead."

As discussed in the thread "[pyxl] Bug in row.height ?" (starting
2009-12-28), the height attribute does, in fact, do something. But
only if the height_mismatch attribute is set. Maybe the verbiage
could be something like

"By default, the height of a row is determined by the tallest font for
that row. However, setting a row's `height_mismatch` attribute to 1
allows its height to be directly controlled by its `height`
attribute." (Backticks to indicate "code font".)

John Y.

[Chris Withers]

Done and uploaded :-)

Chris

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