Unintended output determining 'cache line size' & 'perf tools' availabililty

[srcshelton]

Within a (privileged) podman container:

# python sysreport.py --verbose
…
System hardware:
  Architecture:        aarch64
  CPUs:                12
  CPU types:           8 x Arm Part 0xd81 r0p1, 4 x Arm Part 0xd80 r0p1
  cache info:          <unknown>
>>> getconf LEVEL1_DCACHE_LINESIZE
#o# b'64\n'
#e# b''
  cache line size:     64
…
Performance features:
  perf tools:          False
>>> which perf
#o# b''
#e# b'which: no perf in (/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin)\n'
  perf with OpenCSD:   False

# python --version
Python 3.13.3