90e9a33e1ce3e4e7663dd67e6c1f225afaf5c206
The cxx11 path for `numext::arg` incorrectly returned the complex type instead of the real type, leading to compile errors. Fixed this and added tests. Related to !477, which uncovered the issue.
Eigen is a C++ template library for linear algebra: matrices, vectors, numerical solvers, and related algorithms.
For more information go to http://eigen.tuxfamily.org/.
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