Comment 6 for bug 1174911

<https://bugs.launchpad.net/ubuntu/+source/procps/+bug/295876/comments/3> led me to review pgrep(1)'s man page (which it references).

Under 'NOTES', the man page states:

"The process name used for matching is limited to the 15 characters present in the output of /proc/pid/stat. Use the -f option to match against the complete command line, /proc/pid/cmdline."

Therefore, this is not a bug, even though it is arguable that the behaviour of pgrep(1)'s default invocation is not intuitive. Accordingly, this can be closed as invalid.