docs: spelling and grammar tweaks

docgen/Core_Concepts.md

@@ -2,7 +2,6 @@
 
 Fireorm is just a library to simplify the way we communicate with firestore. It does not implement the underlying communication with the database (it resorts to official sdk's for that, such as [firebase-admin](https://www.npmjs.com/package/firebase-admin)).
 
-Given that fireorm is just
 
 ## Firestore
 
@@ -27,11 +26,11 @@ class Band {
 }
 ```
 
-Wait, I only mentioned name, formationYear and genres in my original specification, why the model has a string property called `id`? Because of the way the data is stored in Firestore, **is required that every model contain a string property called id**. If you create a model without the id property (or with another data type such as Number or Symbol) fireorm won't work correctly.
+Wait, I only mentioned name, formationYear and genres in my original specification, so why does the model have a string property called `id`? Because of the way the data is stored in Firestore, **it's required that every model contain a string property called id**. If you create a model without the id property (or with another data type such as Number or Symbol) fireorm won't work correctly.
 
 ### Fireorm Collections
 
-Great, we have a model, but how can we ‘take’ our model and ‘store’ it the database? In Firestore we store data in _[Documents](https://firebase.google.com/docs/firestore/data-model#documents)_ and they are organized into _[Collections](https://firebase.google.com/docs/firestore/data-model#collections)_. To represent a Collection in our code, we'll use a fairly new JavaScript feature which Typescript let us use super easy: [Decorators](https://www.typescriptlang.org/docs/handbook/decorators.html).
+Great, we have a model, but how can we ‘take’ our model and ‘store’ it the database? In Firestore we store data in _[Documents](https://firebase.google.com/docs/firestore/data-model#documents)_ and they are organized into _[Collections](https://firebase.google.com/docs/firestore/data-model#collections)_. To represent a Collection in our code, we'll use a fairly new JavaScript feature which Typescript lets us use super easy: [Decorators](https://www.typescriptlang.org/docs/handbook/decorators.html).
 
 To declare Collections we can just _decorate_ our model class with fireorm [Collection](globals.md#Collection) decorator and each instance of the model would act as a Firestore Document.
 
@@ -49,15 +48,15 @@ class Band {
 
 See how we're importing the [Collection Decorator](globals.md#Collection) from fireorm and we're decorating our Band class with it. Internally, fireorm will treat each instance of Band as a Firestore Document.
 
-Wait, Firestore Collections must have a name, what will be the name of that collection? By default, fireorm will name the collections with the plural form of the Model name, in this case `Bands`. If you want you use your own name, you can pass an string as the first parameter of the Decorator.
+Wait, Firestore Collections must have a name. What will be the name of that collection? By default, fireorm will name the collections with the plural form of the Model name, in this case `Bands`. If you want you use your own name, you can pass a string as the first parameter of the Decorator.
 
 ```typescript
 @Collection('RockBands')
 ```
 
 ## Fireorm Repositories
 
-One of my goals when developing this library was create a way to use the Repository Pattern with Firestore as easy as possible. We have our models, we have our collections, but how are we supposed to make CRUD operations? That’s what Repositories are for.
+One of my goals when developing this library was to create a way to use the Repository Pattern with Firestore as easily as possible. We have our models, we have our collections, but how are we supposed to make CRUD operations? That’s what Repositories are for.
 
 > In general, repositories are classes or components that encapsulate the logic required to access data sources. They centralize common data access functionality, providing better maintainability and decoupling the infrastructure or technology used to access databases from the domain model layer ([source](https://docs.microsoft.com/en-us/dotnet/architecture/microservices/microservice-ddd-cqrs-patterns/infrastructure-persistence-layer-design)).