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!/^[ \t]*$/

Success #stdin #stdout 0s 23336KB

stdin

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This is a line of text.

The line above was empty.
The line below has ten spaces.
          
That is all.

stdout

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This is a line of text.
The line above was empty.
The line below has ten spaces.
That is all.

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language:

AWK (gawk 4.2.1)

created:

visibility:

public

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