examples/navier-stokes.md

@@ -179,8 +179,8 @@ prob.addDirichletBC(1, _v, _v, g);
 ```
 
 ### Simulation
-The time-stepping process can stationary problem in each iteration can be started
-using an `AdaptInstationary` wrapper class:
+The time-stepping process with a stationary problem in each iteration can be started
+using an `AdaptInstationary` manager class:
 ```c++
 // set initial conditions
 prob.solution(_v).interpolate(g);