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sed Insert a Newline Into the RHS of a Substitution

Q. How do I insert a newline into the RHS of a substitution using sed under Linux / UNIX like operating systems? My line pattern is as follows:

This is a test. This is another input.

I'd like to insert a newline after dot (.).

A. Simple use sed command as follows:

echo 'This is a test. This is another input.' | sed -e 's/\./&\n/'

You need to substitute dot and simply insert newline (\n) to replace with it.
If you are using older sed version try:

echo 'This is a test. This is another input.'  |sed 's/\./& \
> /'

Sample output:

This is a test.
 This is another input.
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