#### Summary: <!-- Summarize the issue/suggestion concisely: --> I use mermaid ( https://mermaid-js.github.io/mermaid/ ) to generate diagrams and it seems that some fo them are not displayed correctly with Inkscape. #### Steps to reproduce: <!-- Describe what you did (step-by-step) so we can reproduce: --> - open Inkscape - open image generated by Mermaid - see the result doesn't match what is displayed by browsers  #### What happened? The image is not displayed as it should : there are no arrow line, the boxes are filled with black and the text is not displayed.  #### What should have happened? The image should be displayed in the same way as in a browser. #### Version Info: ``` - Inkscape Version: Inkscape 1.0 (4035a4f, 2020-05-01) Pango version: 1.43.0 - Operating System: macOS - Operating System version: 10.14.6 ``` <!-- ❤️ Thank you for filling in a new bug report, we appreciate the help! ❤️ Please be patient while we try to find the time to look into your issue. Remember that Inkscape is developed by volunteers in their spare time, we'll try our best to respond to all reports. --> <!-- Please be careful when/after writing # for example in logs, code, or versions of linux - use inline code span - single backticks (`) before and after it, like this - `#1618` - use multi-line code block - triple backticks (```) to fence/enclose console logs - attach long logs as a text file. -->