fix spelling mistakes

Author: haveyaseen

.prettierignore

@@ -0,0 +1 @@
+standalone-docs/

standalone-docs/basics/Selectors.md

@@ -7,7 +7,7 @@ hide_title: true
 
 # Selectors
 
-Selectors are functions that cache their result after they are executed. When you call them again with the same parameters, the result will be returned immediately. This can drastically reduce the performance of web frontends by preventing unnecessary re-rendering of UI components.
+Selectors are functions that cache their result after they are executed. When you call them again with the same parameters, the result will be returned immediately. This can drastically improve the performance of web frontends by preventing unnecessary re-rendering of UI components.
 
 Redux-ORM provides a simple API for creating model related selectors. For example, given Movie is a model class registered to `orm`, we can write:
 
@@ -18,7 +18,7 @@ const movies = createSelector(orm.Movie);
 
 ## Argument types
 
-Pass a single primary key, and array of primary keys or nothing as an argument.
+Pass a single primary key, an array of primary keys or nothing as an argument.
 
 ```js
 movies(state);             // array of all movies
@@ -37,8 +37,11 @@ moviePublisher(state);            // array of each movie's publisher
 moviePublisher(state, 1);         // the first movie's publisher
 moviePublisher(state, [1, 2, 3]); // array of each of the movies with ID 1, 2 and 3
 ```
+
 ### Chaining relationship accessors
+
 For relationships, this works in a chained way as well.
+
 ```js
 const coverBookAuthors = createSelector(orm.Cover.book.authors);
 ```
@@ -57,13 +60,16 @@ coverBookAuthors(state, [1, 2, 3]); // [null, null, null]
 ## Map over collections using `.map()`
 
 Map selectors to model collections:
+
 ```js
 const bookAuthors = createSelector(orm.Book.authors);
 const genreAuthors = createSelector(
     orm.Genre.books.map(bookAuthors)
 );
 ```
+
 The following would work as well and is equivalent:
+
 ```js
 const genreAuthors = createSelector(
     orm.Genre.books.map(orm.Book.authors)