Fixed minor format issues

Author: eshanrnh

15/umbraco-ui-builder/areas/context-apps.md

@@ -170,7 +170,7 @@ Defines the visibility of the context app based on a delegate expression.
 #### Method Syntax
 
 ```cs
-SetVisibility(Func<ContextAppVisibilityContext, bool> visibilityExpression) : ContextAppConfigBuilder
+SetVisibility(Func<ContextAppVisibilityContext, bool> visibilityExpression) : ContextAppConfigBuilder
 ```
 
 #### Example

15/umbraco-ui-builder/areas/trees.md

@@ -25,7 +25,6 @@ Tree(Lambda treeConfig = null) : TreeConfigBuilder
 #### Example
 
 ```csharp
-
 sectionConfig.Tree(treeConfig => {
     ...
 });