added proper page title for creating a new post in category

Author: Oaphi

app/views/posts/new.html.erb

@@ -1,9 +1,8 @@
-<h1 class="has-margin-bottom-2">
-  New Post
-  <% if @category.present? %>
-    in <%= @category.name %>
-  <% end %>
-</h1>
+<% title = "New Post#{ " in #{@category.name}" if @category.present? }" %>
+
+<% content_for :title, title %>
+
+<h1 class="has-margin-bottom-2"><%= title %></h1>
 <% unless @category.present? && @category.min_trust_level.present? && @category.min_trust_level > current_user.trust_level %>
   <% if @category.present? %>
     <p class="has-color-tertiary-500">Not where you meant to post? See <%= link_to 'Categories', categories_path %></p>
@@ -32,7 +31,7 @@
 
 <% else %>
   <div class="notice is-danger is-filled">
-      You don't have a high enough trust level to post in the <%= @category.name %> category.
+    You don't have a high enough trust level to post in the <%= @category.name %> category.
   </div>
   <p>Not where you meant to post? See <%= link_to 'Categories', categories_path %></p>