Repair documentation example setup

Supply the position-domain initialization equations, bind OnePort's extended names explicitly, and make OrdinaryDiffEqSDIRK a direct documentation dependency for ImplicitEuler.

Co-Authored-By: Chris Rackauckas <accounts@chrisrackauckas.com>

Author: ChrisRackauckas

docs/Project.toml

@@ -7,6 +7,7 @@ IfElse = "615f187c-cbe4-4ef1-ba3b-2fcf58d6d173"
 ModelingToolkit = "961ee093-0014-501f-94e3-6117800e7a78"
 ModelingToolkitStandardLibrary = "16a59e39-deab-5bd0-87e4-056b12336739"
 OrdinaryDiffEq = "1dea7af3-3e70-54e6-95c3-0bf5283fa5ed"
+OrdinaryDiffEqSDIRK = "2d112036-d095-4a1e-ab9a-08536f3ecdbf"
 Plots = "91a5bcdd-55d7-5caf-9e0b-520d859cae80"
 SciCompDSL = "91a8cdf1-4ca6-467b-a780-87fda3fff15e"
 
@@ -19,5 +20,6 @@ IfElse = "0.1"
 ModelingToolkit = "11"
 ModelingToolkitStandardLibrary = "2.28.0"
 OrdinaryDiffEq = "6, 7"
+OrdinaryDiffEqSDIRK = "1, 2"
 Plots = "1.36"
 SciCompDSL = "1"

docs/src/connectors/connections.md

@@ -191,7 +191,8 @@ nothing # hide
 As can be seen, we get exactly the same result.  The only difference here is that we are solving an extra equation, which allows us to plot the body position as well.
 
 ```@example connections
-prob = ODEProblem(sys, [], (0, 10.0), fully_determined = true)
+prob = ODEProblem(
+    sys, [], (0, 10.0); initialization_eqs = [sys.body.s ~ 0, sys.body.v ~ 1])
 sol_p = solve(prob)
 
 p1 = plot(sol_p, idxs = [body.v])

docs/src/tutorials/custom_component.md

@@ -36,7 +36,7 @@ this can almost be directly translated to the syntax of `ModelingToolkit`.
 
 ```@example components
 @mtkmodel NonlinearResistor begin
-    @extend OnePort()
+    @extend v, i = oneport = OnePort()
     @parameters begin
         Ga
         Gb
@@ -58,7 +58,7 @@ nothing # hide
 Since the non-linear resistor is essentially a standard electrical component with two ports, we can extend from the `OnePort` component of the library.
 
 ```julia
-@extend OnePort()
+@extend v, i = oneport = OnePort()
 ```
 
 This extends `OnePort` and unpacks `v` and `i` variables.