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perl -e '$mystring="CONTENT- TYPE\n"; $mystring=~s/(.*)/{my $foo= $1; +$foo=~s\/N\/ \/; "$foo"}/e; print $mystring;' #prints CO TENT- TYPE
perl -e '$mystring="CONTENT- TYPE\n"; $mystring=~s/(.*)/{my $foo= $1; +$foo=~s\/\n\/ \/; "$foo"}/se; print $mystring;'