Normal line.

This line contains a NO-BREAK SPACE between Hello and World:

Hello World

This line contains a ZERO WIDTH SPACE between Hello and World:

Hello​World

This line contains a ZERO WIDTH NON-JOINER:

Hello‌World

This line contains a ZERO WIDTH JOINER:

Hello‍World

This line contains a WORD JOINER:

Hello⁠World

The next line contains a LINE SEPARATOR character:

Hello
World

The next line contains a PARAGRAPH SEPARATOR character:

Hello
World

End of file.