Perldoc Search: "$^L" perl-5.20.1

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2 PODs, 2 LINEs found.
146 :     The current format name is stored in the variable $~ ($FORMAT_NAME), and the current top of form format name is in $^ ($FORMAT_TOP_NAME). The current output page number is stored in $% ($FORMAT_PAGE_NUMBER), and the number of lines on the page is in $= ($FORMAT_LINES_PER_PAGE). Whether to autoflush output on this handle is stored in $| ($OUTPUT_AUTOFLUSH). The string output before each top of page (except the first) is stored in $^L ($FORMAT_FORMFEED). These variables are set on a per-filehandle basis, so you'll need to select() into a different one to affect them:
777 :     $^L     What formats output as a form feed. The default is "\f".
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