Return result of fill_textblock#2

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mathielen wants to merge 4 commits intorobgridley:masterfrom

mathielen:master

Commits on Mar 26, 2019

access block properties generically
mathielen
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Commits on Apr 23, 2019

Return result of fill_textblock for making use of textflowhandle -feature (i.e. supply option "textflowhandle"=>0, then use the return value of fill_textblock with another info_textflow)
mathielen
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Commits on Apr 24, 2019

catch exceptions on __destruct
mathielen
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Commits on Apr 26, 2019

test existence
mathielen
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