Linters: all fails when volume value not quoted

[dhodovsk]

All linter tests fail with ERROR: invalid syntax (<unknown>, line 1) on images that have unquoted VOLUME value.
Test data:

FROM awesome/fedora

LABEL com.redhat.component="comp" \
      name="trulo" \
      version="7.0.0" \
      architecture="x86_64" \
      summary="Just keep swimming"

VOLUME /opt/trulo/data

[TomasTomecek]

wow, I didn't know this is a valid syntax: VOLUME /opt/truľo/data