If I have the following two lines in a Word document:

abcd
efgh



and I select abc and replace it by pasting ABC, the result is as expected:

ABCd
efgh

However if I select abcd and paste ABCD the result is

ABCDefgh

That is, if the selection goes to the last character in a line, Word automatically selects the following cr/lf character as well with the result that the character is eliminated after the paste. How can I prevent Word from doing this? (Under Advanced Editing Options I have the box "When selecting, automatically select entire word" unchecked.)