Fix typos and syntax errors in documentation

- Fix typo: "SpraseMatrixCSC" → "SparseMatrixCSC" in advanced_ode_example.md
- Fix grammar: "numerical handle" → "numerically handle" in faq.md
- Fix syntax: Add missing multiplication operator in callback_functions.md (10integrator.t → 10 * integrator.t)

These are simple documentation fixes that improve readability and correctness.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: ChrisRackauckas

docs/src/basics/faq.md

@@ -179,7 +179,7 @@ for automatically transforming your equations.
 
 ### I'm trying to solve DAEs but my solver is unstable and/or slow, what's wrong with IDA and DFBDF?
 
-Fully implicit DAEs ``f(du,u,p,t) = 0`` are extremely difficult to numerical handle for many reasons.
+Fully implicit DAEs ``f(du,u,p,t) = 0`` are extremely difficult to numerically handle for many reasons.
 The linearly implicit form ``Mu'=f(u)`` where ``M`` is a singular mass matrix is much simpler
 numerically and thus results in much better performance. This is seen in many instances with the
 SciMLBenchmarks. Thus it is recommended that in almost all or most situations, one should use the

docs/src/features/callback_functions.md

@@ -137,7 +137,7 @@ of just `10`. This model is implemented as simply:
 ```@example callback1
 dosetimes = [4.0, 6.0, 8.0]
 condition(u, t, integrator) = t ∈ dosetimes && (u[1] < 1.0)
-affect!(integrator) = integrator.u[1] += 10integrator.t
+affect!(integrator) = integrator.u[1] += 10 * integrator.t
 cb = DE.DiscreteCallback(condition, affect!)
 sol = DE.solve(prob, DE.Tsit5(), callback = cb, tstops = dosetimes)
 Plots.plot(sol)

docs/src/tutorials/advanced_ode_example.md

@@ -258,7 +258,7 @@ by default). Then `newW = true` whenever a new `W` matrix is computed, and
 `newW === nothing || newW` and when true, it's only at these points when
 we update the preconditioner, otherwise we just pass on the previous version.
 We use `convert(AbstractMatrix,W)` to get the concrete `W` matrix (matching
-`jac_prototype`, thus `SpraseMatrixCSC`) which we can use in the preconditioner's
+`jac_prototype`, thus `SparseMatrixCSC`) which we can use in the preconditioner's
 definition. Then we use `IncompleteLU.ilu` on that sparse matrix to generate
 the preconditioner. We return `Pl,nothing` to say that our preconditioner is a
 left preconditioner, and that there is no right preconditioning.