- Fixed ref to chapter

- Clarified that we talk about "previous" example not the example "above"

Author: torkar

src/stan-users-guide/algebraic-equations.Rmd

@@ -31,7 +31,7 @@ A system of algebraic equations is coded directly in Stan as a
 function with a strictly specified signature. For example, the
 nonlinear system given above can be coded using the
 following function in Stan (see the [user-defined functions
-section](#functions-programming) for more information on coding
+section](#functions-programming.chapter) for more information on coding
 user-defined functions).
 
 ```
@@ -136,7 +136,7 @@ do so, the current metropolis proposal gets rejected.
 
 ## Control Parameters for the Algebraic Solver {#algebra-control.section}
 
-The call to the algebraic solver shown above uses the default control settings. The solver
+The call to the algebraic solver shown previously uses the default control settings. The solver
 allows three additional parameters, all of which must be supplied if any of them is
 supplied.