Improve the "Verify" usage wording
Improve the "Verify" usage wording

It is the purpose of "Verify" to find out whether a file is valid. As such
it is not a requirement that the passed files already are valid, as that
is exectly what you would like to find out.

sschuberth/spdx-tools,yevster/tools,rtgdk/tools,sschuberth/spdx-tools,sschuberth/spdx-tools,sschuberth/spdx-tools,yevster/tools,rtgdk/tools,yevster/tools,yevster/tools,sschuberth/spdx-tools,yevster/tools,rtgdk/tools