docs(config): clarify issuer and resourceQuery documentation

These options were a bit ambiguous and linked back to section that didn't explain
them too much further in detail. We could likely clean this section up even further
but this should at least remove the confusion around these two options.

Resolves #1645
Resolves #1646

Author: skipjack

src/content/configuration/module.md

@@ -50,7 +50,7 @@ There are two input values for the conditions:
 
 2. The issuer: An absolute path to the file of the module which requested the resource. It's the location of the import.
 
-**Example:** When we `import "./style.css"` from `app.js`, the resource is `/path/to/style.css` and the issuer is `/path/to/app.js`.
+**Example:** When we `import './style.css'` within `app.js`, the resource is `/path/to/style.css` and the issuer is `/path/to/app.js`.
 
 In a Rule the properties [`test`](#rule-test), [`include`](#rule-include), [`exclude`](#rule-exclude) and [`resource`](#rule-resource) are matched with the resource and the property [`issuer`](#rule-issuer) is matched with the issuer.
 
@@ -115,7 +115,15 @@ Inline loaders and `!` prefixes should not be used as they are non-standard. The
 
 ## `Rule.issuer`
 
-A [`Condition`](#condition) matched with the issuer. See details in [`Rule` conditions](#rule-conditions).
+A [`Condition`](#condition) to match against the module that issued the request. In the following example, the `issuer` for the `a.js` request would be the path to the `index.js` file.
+
+__index.js__
+
+``` js
+import A from './a.js'
+```
+
+This option can be used to apply loaders to the dependencies of a specific module or set of modules.
 
 
 ## `Rule.loader`
@@ -146,7 +154,7 @@ An array of [`Rules`](#rule) from which only the first matching Rule is used whe
       resourceQuery: /external/, // foo.css?external
       use: 'file-loader'
     }
-  ] 
+  ]
 }
 ```
 
@@ -194,16 +202,17 @@ A [`Condition`](#condition) matched with the resource. You can either supply a `
 
 ## `Rule.resourceQuery`
 
-A [`Condition`](#condition) matched with the resource query. The condition matches against a string that starts with a question mark (`"?exampleQuery"`). See details in [`Rule` conditions](#rule-conditions).
+A [`Condition`](#condition) matched with the resource query. This option is used to test against the query section of a request string (i.e. from the question mark onwards). If you were to `import Foo from './foo.css?inline'`, the following condition would match:
 
-```javascript
+``` js
 {
   test: /.css$/,
-  resourceQuery: /inline/, // foo.css?inline
+  resourceQuery: /inline/,
   use: 'url-loader'
 }
 ```
 
+
 ## `Rule.rules`
 
 An array of [`Rules`](#rule) that is also used when the Rule matches.