CGSolver: Restore precision

dune/solvers/solvers/cgsolver.cc

@@ -142,19 +142,21 @@ void CGSolver<MatrixType, VectorType>::solve()
 
         // Output
         if (this->verbosity_ == NumProc::FULL) {
-            std::cout << std::setw(5) << i;
+            std::streamsize const oldPrecision = std::cout.precision();
+            std::ios_base::fmtflags const oldFormatFlags = std::cout.flags();
 
-            std::cout << std::setiosflags(std::ios::scientific);
-            std::cout << std::setw(15) << std::setprecision(7) << error;
-            std::cout << std::resetiosflags(std::ios::scientific);
+            std::cout << std::setw(5) << i
 
-            std::cout << std::setiosflags(std::ios::fixed);
-            std::cout << std::setw(9) << std::setprecision(5) << convRate;
-            std::cout << std::resetiosflags(std::ios::fixed);
+                      << std::scientific
+                      << std::setw(15) << std::setprecision(7) << error
 
-            std::cout << std::endl;
-        }
+                      << std::fixed
+                      << std::setw(9) << std::setprecision(5) << convRate
 
+                      << std::endl;
+            std::cout << std::setprecision(oldPrecision)
+                      << std::setiosflags(oldFormatFlags);
+        }
     }