Selection Tests With Space

Line 1

Line 2

Line 3

A copy-paste of the above lines with Firefox 133 gives

Line 1 Line 2

Line 3

instead of

Line 1

Line 2

Line 3

And a copy-paste of Line 1 or Line 2 starting just above the line inserts a spurious space at the beginning:

 Line 1

and

 Line 2