i found it:

template inheritance

"

"

then manifest content

{
'name': '.',
'category': 'Hidden/Template',
'summary': '.',
'website': '.',
'version': '17.0.0',
'description': """there is a css code form book symbol in this module.So after install
this module it changes shape of question tooltip mark of question mark symbol to book symbol""",

'depends': ['base', 'web'],

'assets': {
'web.assets_backend': [
'etud_change_tooltip_question_mark/static/src/views/**/*'
],
},
'license': 'LGPL-3',
}