message: docs(virtuals): fix typo & change comments to be more readable
diff: @@ -49,7 +49,7 @@ Resulting Document in MongoDB:
  ### Difference between @prop's get & set and this get & set
  -*This shows the difference between [`@prop`'s get & set](api/decorators/prop.md#get--set) and [this one](api/virtuals.md#get--set)*
  +*This shows the difference between [`@prop`'s get & set](./decorators/prop.md#get--set) and [this one](#get--set)*
  The difference between `@prop`'s and this one is simple, `@prop`'s get & set are ***actual properties*** that get saved to the database, only with a conversion layer.
  The get & set of *getter's & setter's* are absolutely virtual.
  @@ -79,7 +79,7 @@ class Kittens {
  class Cat {
  @prop({
  ref: () => Kittens,
  - foreignField: 'parent', // compare this value to the local document populate is called on
  + foreignField: 'parent', // compare this value to the document populate is called on
  localField: '_id' // compare this to the foreign document's value defined in "foreignField"
  })
  public kittens: Ref<Kittens>[];
  @@ -115,7 +115,7 @@ class Sub {
  }
  class Parent {
  @prop({
  - ref: () => (doc: DocumentType<Parent>) => doc.from, // This need to be written this way, because since "typegoose@7.1" typegoose evaluates the first ref-function
  + ref: () => (doc: DocumentType<Parent>) => doc.from, // This need to be written this way, because since typegoose "7.1", deferred function are supported
  foreignField: () => 'parentId', // no "doc" parameter provided here
  localField: (doc: DocumentType<Parent>) => doc.local,
  justOne: false
  @@ -138,7 +138,7 @@ await SubModel.create({ parentId: parent._id });
  ### Why is my virtual not included in the output?
  -By default Mongoose doesn't output virtuals. To archive this, you need to add `toObject` and(/or) `toObject` to `schemaOptions` in `@modelOptions`.
  +By default Mongoose doesn't output virtuals. To achive this, you need to add `toObject` and(/or) `toObject` to `schemaOptions` in `@modelOptions`.
  Note: it can be set in `@modelOptions`, but it can be set in `getModelForClass` too (and in the `doc.toJSON()`/`doc.toObject()` functions).
  