I created new file "test.html" without code, the browser was opened after click this file. ==> No Issue.

I writed code (html, css and javascript) in this file html. But html type is automatically changed to perl type, wrong file association. ==> Issue.

Screenshot:


Example of file:
test.html
test2.html
You can check two files that have the same issue?

How can I disable auto type-detection of file?
Can someone help?

Sorry for my bad English.