Research V3 development

Work on file man/man6/ptx.6

Synthesized-from: v3

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+.pa 1
+.he 'PTX (VI)'3/15/72'PTX (VI)'
+.ti 0
+NAME           ptx --  permuted index
+.sp
+.ti 0
+SYNOPSIS       ptx\b\b\b___ input output
+.sp
+.ti 0
+DESCRIPTION    ptx\b\b\b___
+generates a permuted index from file input\b\b\b\b\b_____ on file output\b\b\b\b\b\b______.
+It has three phases: the first does the permutation, generating
+one line for each keyword in an input line.  The
+keyword is rotated to the front.
+The permuted file is then
+sorted.
+Finally the sorted lines are rotated so the keyword
+comes at the middle of the page.
+
+input\b\b\b\b\b_____ should be edited to remove useless lines.
+The following words are suppressed:  "a", "and", "as",
+"is", "for", "of", "on", "or", "the", "to", "up".
+
+The index for this manual was generated using ptx\b\b\b___.
+.sp
+.ti 0
+FILES          --
+.sp
+.ti 0
+SEE ALSO       sort(I)
+.sp
+.ti 0
+DIAGNOSTICS    some
+.sp
+.ti 0
+BUGS           --