Update sharding docs some more

src/sharding/Shard.js

@@ -6,7 +6,9 @@ const { Error } = require('../errors');
 const delayFor = require('util').promisify(setTimeout);
 
 /**
- * A self-contained shard spawned by the {@link ShardingManager}.
+ * A self-contained shard created by the {@link ShardingManager}. Each one has a {@link ChildProcess} that contains
+ * an instance of the bot and its {@link Client}. When its child process exits for any reason, the shard will spawn a
+ * new one to replace it as necessary.
  * @extends EventEmitter
  */
 class Shard extends EventEmitter {

src/sharding/ShardingManager.js

@@ -9,11 +9,11 @@ const delayFor = require('util').promisify(setTimeout);
 
 /**
  * This is a utility class that makes multi-process sharding of a bot an easy and painless experience.
- * It works by spawning a self-contained {@link ChildProcess} for each individual shard, each containing its own client.
+ * It works by spawning a self-contained {@link ChildProcess} for each individual shard, each containing its own
- * They all have a line of communication with the master process, and there are several useful methods that utilise
+ * instance of your bot's {@link Client}. They all have a line of communication with the master process, and there are
- * it in order to simplify tasks that are normally difficult with multi-process sharding. It can spawn a specific number
+ * several useful methods that utilise it in order to simplify tasks that are normally difficult with sharding. It can
- * of shards or the amount that Discord suggests for the bot, and takes a path to your main bot script to launch for
+ * spawn a specific number of shards or the amount that Discord suggests for the bot, and takes a path to your main bot
- * each one.
+ * script to launch for each one.
  * @extends {EventEmitter}
  */
 class ShardingManager extends EventEmitter {