files: 0.768
VMM: 0.535
device: 0.309
ppc: 0.291
i386: 0.202
KVM: 0.171
TCG: 0.157
vnc: 0.138
arm: 0.136
semantic: 0.129
user-level: 0.125
graphic: 0.123
x86: 0.120
mistranslation: 0.108
virtual: 0.099
PID: 0.084
network: 0.070
boot: 0.065
risc-v: 0.057
socket: 0.056
register: 0.046
permissions: 0.045
kernel: 0.045
peripherals: 0.021
performance: 0.017
assembly: 0.014
architecture: 0.014
hypervisor: 0.010
debug: 0.010

Get get_maintainer.pl working with cover letter files