\documentclass{article}
\begin{document}
0 A long, wrapped paragraph with Lots of text
and lots more text  and lots more text  and lots more text  and lots more text
and lots more text  and lots more text  and lots more text  and lots more text
and lots more text  and lots more text  and lots more text  and lots more text.

1 initial par

3 par after empty line.
        
5 par after line with spaces.
	
7 par after line with tab.
	

{
  \catcode`\M=5\relax % EOL
  \catcode`\I=9\relax % Ignore
  \catcode`\S=10\relax % Space

1 initial parM nothing past the end
IIIII
3 par after ignore catcoded characters
SSSSSS
5 par after space catcoded characters
}

{
  \catcode`^^Q=9\relax % control char treatdd as Ignore
\catcode`^^R=10\relax % control char treated as space
1 initial par^^M nothing past the end
^^Q^^Q
3 par after fake ignore catcoded character
^^R^^R
5 par after fake space catcoded characters
}

\end{document}
