Check xlink:href for gradientUnits="userSpaceOnUse"

Created by: nthykier

When considering to prune attributes set to a default values, we checked the gradientUnits attribute first to determine if that was valid. Unfortunately, we omitted to check whether the gradientUnits attribute was inherited via xlink:ref. This commit corrects that bug.

Closes: #225 Signed-off-by: Niels Thykier niels@thykier.net

mentioned in issue #225

Created by: codecov-io

Codecov Report

Merging #271 (e0e3f816) into master (fbf0c06e) will decrease coverage by 0.03%. The diff coverage is 91.30%.

@@            Coverage Diff             @@
##           master     #271      +/-   ##
==========================================
- Coverage   94.08%   94.05%   -0.04%     
==========================================
  Files           6        6              
  Lines        2264     2286      +22     
==========================================
+ Hits         2130     2150      +20     
- Misses        134      136       +2     

Impacted Files	Coverage Δ
scour/scour.py	94.50% <91.30%> (-0.04%)

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restored source branch github/fork/nthykier/gh-225-gradient-fix