There are three common ways how configuration could be updated:

1. Using Frontend forms.
   This is where most of strings are trimmed. Leading and trailing spaces (including new lines) are removed.
2. Using API.
   This is where nothing is trimmed. Data is stored "as is".
3. Using import.
   This is where some strings are somehow trimmed. Trailing new lines are trimmed in some fields (line descriptions), leading new lines are also sometimes trimmed (for example, in item Scripts).

For example:

or

It is expected that this behavior is documented and consistent if possible.