[BUG] In parsing of transclusion in widget attributes

[mklauber]

Describe the bug

For some reason, when a httprequest is made via <$action-sendmessage $message="tm-http-request"..., query parameters provided by query-* values that use transclusions require removing spaces around the transclusion string. Essentially query-data={{param}} works, but query-data={{ param }} doesn't.

Expected behavior

Query parameters can use the same transclusion strings that can be used elsewhere, including with spaces between the curly braces and contents

To Reproduce

Import the following tiddlers. tiddlers.json

Looking at the two [[Working Example]] and [[Broken Example]] tiddlers, open the web developer tools, switch to the network tab, and compare the request between the two buttons.

Screenshots

TiddlyWiki Configuration

• Version [5.3.3]
• Saving mechanism [Single File Mode]
• Plugins installed [None]

Desktop (please complete the following information):

• OS: [Linux]
• Browser [Firefox or Chrome]

Additional context

No response

[btheado]

It doesn't look like anything specific to $action-sendmessage. It is any use of the transclude version of attribute values

This

{{ param }} - {{param}}

<$text text={{ param }}/> - <$text text={{param}}/>

renders as

Value - Value
- Value

The parsing must be different for the transclude widget shorthand vs. attribute values.

[mklauber]

Good find.