Stop escaping special characters in mermaid tooltips

[Carwyn Pelley (cpelley)]

Something I had been meaning to get to in quite some time.

<br> tags aren't being recognized as newlines in Mermaid tooltips when used within my custom web component (mermaid-table-standard.js), even though they normally work in standard Mermaid diagrams.

Web components often escape special characters (like <, >, and /) by default when interpolating values into templates. <br> may then be rendered as plain text (<br>) instead of being interpreted as an HTML line break.

Added MutationObserver-based rebinding so this keeps working across Mermaid re-renders/theme toggles.

Test

Before change:

After change:

[Carwyn Pelley (cpelley)]

Note Rob Purvis (@mo-robert-purvis) that if you want to play with this yourself you need not change the src of the js file.

Simply open one of the test result files within dagrunner with your browser:
e.g. dagrunner/tests/results/dagrunner.tests.utils.networkx.test_integration.test_basic.html

You will notice that all files generated by the dagrunner tests, reference the relative web component path rather than than the remotely hosted one.

[Rob Purvis (mo-robert-purvis)]

Looks good - tooltips fixed