Mary had a little lamb;
Its fleece was white as snow.
And every where that Mary went,
This line is sure to go.
The lamb was sure to die.

Here is a block of text which appears
from nowhere
in
particular
although it is
not that important.

Once upon a time,
there lived eight bears:
Mummy bear, daddy bear,
Uncle bear, Aunty bear,
Next door bear, Great Aunty bear
Brother bear and baby bear.

Then some lines appeared from nowhere
which would be deleted.

Mary had a little lamb;
This line was added.
Its fleece was white as snow.
And every where that Mary went,
The lamb was sure to die.

Once upon a time,
there lived eight bears:
Mummy bear, daddy bear,
Uncle bear, Aunty bear,
Next door bear, Great Aunty bear
Brother bear and baby bear.