[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

include/eigenpy/register.hpp

@@ -106,7 +106,7 @@ struct EIGENPY_DLLAPI Register {
   static Register &instance();
 
  private:
-  Register(){};
+  Register() {};
 
   struct Compare_PyTypeObject {
     bool operator()(const PyTypeObject *a, const PyTypeObject *b) const {