Merge branch '6.3' into 6.4

* 6.3:
  Fix typos

Author: javiereguiluz

frontend.rst

@@ -47,7 +47,7 @@ Webpack Encore
 
 `Webpack Encore`_ is a simpler way to integrate `Webpack`_ into your application.
 It *wraps* Webpack, giving you a clean & powerful API for bundling JavaScript modules,
-pre-processing CSS & JS and compiling and minifying assets. Encore gives you professional
+pre-processing CSS & JS and compiling and minifying assets. Encore gives you a professional
 asset system that's a *delight* to use.
 
 Encore is inspired by `Webpacker`_ and `Mix`_, but stays in the spirit of Webpack:
@@ -57,7 +57,7 @@ to solve the most common Webpack use cases.
 .. tip::
 
     Encore is made by `Symfony`_ and works *beautifully* in Symfony applications.
-    But it can be used in any PHP application and even with other server side
+    But it can be used in any PHP application and even with other server-side
     programming languages!
 
 .. _encore-toc:
@@ -74,7 +74,7 @@ Getting Started
 Adding more Features
 ....................
 
-* :doc:`CSS Preprocessors: Sass, LESS, etc </frontend/encore/css-preprocessors>`
+* :doc:`CSS Preprocessors: Sass, LESS, etc. </frontend/encore/css-preprocessors>`
 * :doc:`PostCSS and autoprefixing </frontend/encore/postcss>`
 * :doc:`Enabling React.js </frontend/encore/reactjs>`
 * :doc:`Enabling Vue.js (vue-loader) </frontend/encore/vuejs>`