Update usewhitespace rule documentation

Author: Kapil Borle

RuleDocumentation/UseWhitespace.md

@@ -2,16 +2,35 @@
 **Severity Level: Warning**
 
 ## Description
+This rule enforces consistent brace, parenthesis, binary operator, assignment operator and separator styles. For more information please see the [Parameters](#parameters) section.
 
-## How to Fix
-
-## Example
-### Wrong:
-```PowerShell
+**Note**: This rule is not enabled by default. The user needs to enable it through settings.
 
+## Configuration
+```powershell
+    Rules = @{
+        PSUseWhitespace = @{
+            Enable = $true
+            CheckOpenBrace = $true
+            CheckOpenParen = $true
+            CheckOperator = $true
+            CheckSeparator = $true
+        }
 ```
 
-### Correct:
-```PowerShell
+### Parameters
 
-```
+#### Enable: bool (Default value is `$false`)
+Enable or disable the rule during ScriptAnalyzer invocation.
+
+#### CheckOpenBrace: bool (Default value is `$true`)
+Checks if there is a space between a keyword and its corresponding open brace. E.g. `foo { }`.
+
+#### CheckOpenParen: bool (Default value is `$true`)
+Checks if there is space between a keyword and its corresponding open parenthesis. E.g. `if (true)`.
+
+#### CheckOperator: bool (Default value is `$true`)
+Checks if a binary operator is surrounded on both sides by a space. E.g. `$x = 1`.
+
+#### CheckSeparator: bool (Default value is `$true`)
+Checks if a comma or a semicolon is followed by a space. E.g. `@(1, 2, 3)` or `@{a = 1; b = 2}`.