maint: remove form feed characters from sources These are no longer useful and can impact viewing patches in some mail programs for example.
* src/cksum.c: Remove ^L characters. * src/comm.c: Likewise. * src/kill.c Likewise. * src/ln.c Likewise. * src/nl.c Likewise. * src/pr.c Likewise. * src/ptx.c Likewise. * src/split.c Likewise. * src/tr.c Likewise. * src/tsort.c Likewise. * src/uniq.c Likewise. * src/wc.c Likewise.
