Script Editor.app: newlines are formatted as CR rather than LF
Below is a screenshot showing the raw clipboard data when copying three lines from Script Editor.app on OS X 10.10.1:



The lines in Script Editor appear as:



The outcome depends on your destination text editor when pasting. The copied lines are encoded in multiple formats on the clipboard. The destination of the paste determines which format is preferred.

For example, pasting from Script Editor to BBEdit results in LF line delimiters. However, that is the default line ending style I have set in BBEdit.