spelling and minor changes

Author: ValentinKaisermayer

docs/src/tutorials/custom_component.md

@@ -1,9 +1,9 @@
 # Custom Component
-In this tutorial the creation of a custom component is demonstrated via the [Chua's circuit](https://en.wikipedia.org/wiki/Chua%27s_circuit).
+In this tutorial, the creation of a custom component is demonstrated via the [Chua's circuit](https://en.wikipedia.org/wiki/Chua%27s_circuit).
 The circuit is a simple circuit that shows chaotic behaviour. 
 Except for a non-linear resistor every other component already is part of `ModelingToolkitStandardLibrary.Electrical`.
 
-First we need to make some imports.
+First, we need to make some imports.
 ```@example components
 using ModelingToolkit
 using ModelingToolkitStandardLibrary.Electrical
@@ -26,7 +26,7 @@ equation
   i = if (v < -Ve) then Gb*(v + Ve) - Ga*Ve else if (v > Ve) then Gb*(v - Ve) + Ga*Ve else Ga*v;
 end NonlinearResistor;
 ```
-this can almost be directly translate it to the syntax of `ModelingToolkit`.
+this can almost be directly translated to the syntax of `ModelingToolkit`.
 ```@example components
 @parameters t
 
@@ -49,26 +49,26 @@ nothing # hide
 ```
 
 ### Explanation
-All components in `ModelingToolkit` are created via a function that serves as the constructor and returns some form of system, in this case a `ODESystem`.
+All components in `ModelingToolkit` are created via a function that serves as the constructor and returns some form of system, in this case, an `ODESystem`.
 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
 @named oneport = OnePort()
 ```
 This creates a `OnePort` with the `name = :oneport`.
-For easier notation we can unpack the states of the component
+For easier notation, we can unpack the states of the component
 ```julia
 @unpack v, i = oneport
 ```
 It might be a good idea to create parameters for the constants of the `NonlinearResistor`.
 ```julia
 pars = @parameters Ga=Ga Gb=Gb Ve=Ve
 ```
-The syntax looks funny but it simply creates symbolic parameters with the name `Ga` where it's default value is set from the function's argument `Ga`.
-While this is not strictly necessary it allows the user to `remake` the problem easily with different parameters or allow for auto-tuning or parameter optimization without having to do all costly steps that may be involved with building and simplifying a model.
+The syntax looks funny but it simply creates symbolic parameters with the name `Ga` where its default value is set from the function's argument `Ga`.
+While this is not strictly necessary it allows the user to `remake` the problem easily with different parameters or allow for auto-tuning or parameter optimization without having to do all the costly steps that may be involved with building and simplifying a model.
 The non-linear (in this case piece-wise constant) equation for the current can be implemented using `IfElse.ifelse`.
 Finally, the created `oneport` component is extended with the created equations and parameters.
-In this case no extra state variables are added, hence an empty vector is supplied.
-The independent variable `t` needs to be supplied as second argument.
+In this case, no extra state variables are added, hence an empty vector is supplied.
+The independent variable `t` needs to be supplied as the second argument.
 ```julia
 extend(ODESystem(eqs, t, [], pars; name=name), oneport)
 ```
@@ -105,7 +105,7 @@ nothing # hide
 
 ## Simulating the Model
 Now the model can be simulated.
-First `structural_simplify` is called on the model and a `ODEProblem` is build from the result.
+First, `structural_simplify` is called on the model and an `ODEProblem` is built from the result.
 Since the initial voltage of the first capacitor was already specified via `v_start`, no initial condition is given and an empty pair is supplied.
 ```@example components
 sys = structural_simplify(model)

docs/src/tutorials/rc_circuit.md

@@ -1,7 +1,7 @@
 # RC Circuit Model
 
 This tutorial is a simplified version of the [RC circuit tutorial in the
-ModelingToolkit.jl documentation](https://mtk.sciml.ai/dev/tutorials/acausal_components/).
+`ModelingToolkit.jl` documentation](https://mtk.sciml.ai/dev/tutorials/acausal_components/).
 In that tutorial, the full RC circuit is built from scratch. Here, we will use the
 components of the `Electrical` model in the ModelingToolkit Standard Library to simply
 connect pre-made components and simulate the model.