Target pre tag on copy to fix firefox copy bug

What does this MR do?

Related to: #18534 (closed)

Fixes the formatting when copy/pasting with Firefox using the "Copy file contents" button.

Screenshots (strongly suggested)

Location in GitLab

Example of incorrect formatting

# For more information about the properties used in # this file, please see the EditorConfig documentation: # https://editorconfig.org/ root = true [*] charset = utf-8 end_of_line = lf indent_size = 2 indent_style = space insert_final_newline = true trim_trailing_whitespace = true [*.md] trim_trailing_whitespace = false

Example of correct formatting

# For more information about the properties used in
# this file, please see the EditorConfig documentation:
# https://editorconfig.org/

root = true

[*]
charset = utf-8
end_of_line = lf
indent_size = 2
indent_style = space
insert_final_newline = true
trim_trailing_whitespace = true

[*.md]
trim_trailing_whitespace = false

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Code review guidelines
• Merge request performance guidelines
• Style guides

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• Tested in all supported browsers