Don't fail to parse urls from warning messages that include repeated warnings.

[mjkkirschner]

Purpose

This PR fixes two issues with the documentation browser:

1. DereferencingANonePointer exception was mis spelled.

2. Sometimes during delta execution warnings will have different expressionIDs assigned for certain nodes that are composed of multiple expressions - like a multi-output node.

The end result is that the warning text is composed of multiple warnings like:

Dereferencing null pointer - DereferencingNonePointer.html/n Dereferencing null pointer - DereferencingNonePointer.html/n Dereferencing null pointer - DereferencingNonePointer.html

The code that parses url's expected that all warning strings would only be composed of a single single url - instead we make the splitting a bit smarter, by also using the same delimiter that is used to join the warnings.

This code returns the first url found.

TODO

• tests

Declarations

Check these if you believe they are true

• The codebase is in a better state after this PR
• Is documented according to the standards
• The level of testing this PR includes is appropriate
• User facing strings, if any, are extracted into *.resx files
• All tests pass using the self-service CI.
• Snapshot of UI changes, if any.
• Changes to the API follow Semantic Versioning and are documented in the API Changes document.
• This PR modifies some build requirements and the readme is updated

Release Notes

Fixed a bug where documentation for errors could not be found, or reported illegal characters in the documentation browser.

[sm6srw]

LGTM!

[pinzart90]

@mjkkirschner do you think that other parts of dynamo could misbehave because of the Delta execution warnings will have different expressionIDs issue ?

[pinzart90]

LGTM

[mjkkirschner]

@pinzart90 - I'm not sure, I actually think that the delta execution behavior is correct, and the first execution only containing a single expressionID is incorrect - it just happened that this masks the documentation issue when testing simple interactions.