fix coverage pb

tests/test_EigenvalueSolver.cpp

@@ -140,7 +140,7 @@ TEST_CASE("EigenvalueSolver", "[algebra]")
           }
         }
 #else    //  PUGS_HAS_SLEPC
-        REQUIRE_THROWS_WITH(EigenvalueSolver{}.computeExpForSymmetricMatrix(A, expP),
+        REQUIRE_THROWS_WITH(EigenvalueSolver{}.computeExpForSymmetricMatrix(A, expA),
                             "not implemented yet: SLEPc is required to solve eigenvalue problems");
 #endif   // PUGS_HAS_SLEPC
       }