diff --git a/aio/content/guide/aot-compiler.md b/aio/content/guide/aot-compiler.md
index 246e6842c0..ee55630756 100644
--- a/aio/content/guide/aot-compiler.md
+++ b/aio/content/guide/aot-compiler.md
@@ -621,7 +621,6 @@ Using `*ngIf` allows the TypeScript compiler to infer that the `person` used in
 
 For more information about input type narrowing, see [Input setter coercion](guide/template-typecheck#input-setter-coercion) and [Improving template type checking for custom directives](guide/structural-directives#directive-type-checks).
 
-
 ### Non-null type assertion operator
 
 Use the [non-null type assertion operator](guide/template-syntax#non-null-assertion-operator) to suppress the `Object is possibly 'undefined'` error when it is inconvenient to use `*ngIf` or when some constraint in the component ensures that the expression is always non-null when the binding expression is interpolated.
diff --git a/aio/content/guide/structural-directives.md b/aio/content/guide/structural-directives.md
index 5a269d4bb7..6f44eb3891 100644
--- a/aio/content/guide/structural-directives.md
+++ b/aio/content/guide/structural-directives.md
@@ -846,7 +846,7 @@ Use the type-guard properties to inform the template type checker of an expected
 
 This section provides example of both kinds of type-guard property.
 
-<div class="alert is-helpful>
+<div class="alert is-helpful">
 
    For more information, see [Template type checking guide](guide/template-typecheck "Template type-checking guide").
 
@@ -962,7 +962,7 @@ Here is the source from the `src/app/` folder.
 
 
 
-You learned
+You learned:
 
 * that structural directives manipulate HTML layout.
 * to use [`<ng-container>`](guide/structural-directives#ngcontainer) as a grouping element when there is no suitable host element.