textLength and lengthAdjust not working on TSPAN elements
#### Summary: SVG 1.1 defines the attributes _textLength_ and _lengthAdjust_ for TSPAN elements. However, Inkscape does not render these correctly. It does, however, seem able to use those attributes on TEXT elements. #### Steps to reproduce: 1. create TEXT element in Inkscape, comprising of two lines (two TSPAN elements) 1. in the XML editor, click the second tspan element 1. add the following attributes: - textLength: 500 - lengthAdjust: spacingAndGlyphs 1. OK changes 1. Save file and open in Chrome (second TSPAN displays wider) #### What happened? Second TSPAN element was not affected by the _lengthAdjust_ and _textLength_ attributes in Inkscape's view, but is affected by the attributes in other software (such as Chrome). ![2020-10-20_11_15_46-test.svg_-_Inkscape](/uploads/e161277bf0adf32b7a39b8db26c2d643/2020-10-20_11_15_46-test.svg_-_Inkscape.png) #### What should have happened? The second TSPAN element should have been greatly wider than the first - as rendered in Google Chrome and indicated by the SVG 1.1 specification for TSPAN elements. ![2020-10-20_11_16_29-test.svg](/uploads/de99ce4531a31d1d1637315165672342/2020-10-20_11_16_29-test.svg.png) #### Version Info: - Inkscape Version: 1.0 (4035a4fb49, 2020-05-01) - Operating System: Microsoft Windows 10 Pro - Operating System version: 10.0.16299 Build 16299
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