Symptom
If you write codes in your post in Google Group, it may be displayed wrongly when is fetched by Tiddlywiki Talk and is displayed in Talk Forum!
It seems if one wraps codes in codeblock e.g. triple backticks, they will be shown correctly in Talk!
Example i
Code wrapped in backticks
<$vars thisDynamicFilter={{{ [fields[]regexp[aaa]addprefix<p1>addsuffix<p2>] [<p3>] +[join[ ]] }}}>
<$list filter={{{ [<thisDynamicFilter>] }}}>
''total:'' <<currentTiddler>>
</$list>
</$vars>
Example ii
Code is NOT wrapped in backticks
<$vars thisDynamicFilter={{{ [fields[]regexp[aaa]addprefixaddsuffix] [] +[join[ ]] }}}>
<$list filter={{{ [] }}}>
‘‘total:’’ <>
</$list>
</$vars>
Open GG and Talk and compare the result!