MatchDotNL–seems no usage,just only takes trouble

[me75]

[HKEY_CURRENT_USERSoftwareEmSoftEmEditor v3Common]
“MatchDotNL”=dword:00000001

Tools/Customize/Regular Expressions Can Match New Line Characters

What is this option usage?It puzzles me.

When searching in a document which contents a very long line,checking this option will make a search very slow.
Checking this option,Regular Expressions(.) Can NOT Match New Line Characters.
Not checking this option,Regular Expressions(n) Can Match New Line Characters too.

link 1:
/modules/newbb/viewtopic.php?topic_id=457&forum=12
link 2:
/forum/viewtopic.php?p=1114 :-o

[CaptainFlint]

For this option to work, you should also set non-zero value for the Additional Lines to Search for Regular Expression option.

[me75]

Many thanks to Flint. :-D I get it.

But,Is it a bug?
Checking the option(Regular Expressions Can Match New Line Characters) will make some search very slow.
Event if value for the Additional Lines to Search for Regular Expression option is Zero.

[Author]

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