Merge topic 'small_spdx_fixups'

e31ccc8e SPDX: Documentation fixups
cf97ee75 Merge branch 'small_spdx_fixups' into 'small_spdx_fixups'
c2163ed0 spdx: Refactor python script introducing generate_spdx_file
46987fef spdx: Minor tweak of the python generation script
121fd6f1 spdx: Skip generation of response file if there are no inputs
b404c538 spdx: Fix generation failure on Windows by adding support for response files
d58ce2e1 spdx: Support specifying copyright text with apostrophe
8a842ed4 docs(spdx): Remove obsolete limitation related to escape of parentheses
...

Acked-by: Kitware Robot <kwrobot@kitware.com>
Tested-by: buildbot <buildbot@kitware.com>
Reviewed-by: Julien Fausty <julien.fausty@kitware.com>
Merge-request: !10270