This is pdfeTeX, Version 3.141592-1.30.4-2.2 (Web2C 7.5.5) entering extended mode (./2-ident.tex [1{/usr/local/teTeX/share/texmf.local/fonts/map/pdftex/updmap/pd ftex.map}] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20] [21] ! Missing { inserted. _ l.1481 \qquad||{\ttninepoint\it $f =~ s/__ /::/g;} ! Missing $ inserted. $ ^^M l.1481 \qquad||{\ttninepoint\it $f =~ s/__/::/g;} ! Missing } inserted. } \endgroup \endlines ->\endgroup \medbreak \noindent l.1488 \endlines [22] [23] ) (see the transcript file for additional information) Output written on 2-ident.pdf (23 pages, 163715 bytes). Transcript written on 2-ident.log.