core: fix namespaces

6 jobs for pr/22 in 47 seconds (queued for 2 seconds)
Name Stage Failure
failed
format Test
-} // namespace solvers
-} // namespace eiquadprog
+} // namespace solvers
+} // namespace eiquadprog
++ git diff --ignore-submodules
++ wc -l
+ exit 765
Cleaning up project directory and file based variables
ERROR: Job failed: exit code 1

failed
robotpkg-eiquadprog-ferrum Test
Auto-merging math/py-ndcurves/Makefile
CONFLICT (content): Merge conflict in math/py-ndcurves/Makefile
Auto-merging math/ndcurves/distinfo
CONFLICT (content): Merge conflict in math/ndcurves/distinfo
Auto-merging math/ndcurves/Makefile
CONFLICT (content): Merge conflict in math/ndcurves/Makefile
Automatic merge failed; fix conflicts and then commit the result.
Cleaning up project directory and file based variables
ERROR: Job failed: exit code 1