Aren't you missing a chomp?
I had this: 
 s!\n!!g;

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I have beheld the tarball of 22.1 on ftp.gnu.org with my own eyes. How can you say that there is no God in the Church of Emacs? -- David Kastrup 
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In reply to Re^2: When every 2 lines of a file (sans first) should be 1... by metaperl
in thread When every 2 lines of a file (sans first) should be 1... by metaperl

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