refactor: set OpeningChars for parser

OliverBooth/Data/Web/ArticleTemplate.cs

@@ -1,7 +1,4 @@
-using SmartFormat;
-using SmartFormat.Core.Extensions;
-
-namespace OliverBooth.Data.Web;
+namespace OliverBooth.Data.Web;
 
 /// <summary>
 ///     Represents a MediaWiki-style template.

OliverBooth/Markdown/TemplateExtension.cs

@@ -11,6 +11,10 @@ internal sealed class TemplateExtension : IMarkdownExtension
 {
     private readonly TemplateService _templateService;
 
+    /// <summary>
+    ///     Initializes a new instance of the <see cref="TemplateExtension" /> class.
+    /// </summary>
+    /// <param name="templateService">The template service.</param>
     public TemplateExtension(TemplateService templateService)
     {
         _templateService = templateService;

OliverBooth/Markdown/TemplateInlineParser.cs

@@ -12,6 +12,14 @@ public sealed class TemplateInlineParser : InlineParser
     private static readonly IReadOnlyDictionary<string, string> EmptyParams =
         new Dictionary<string, string>().AsReadOnly();
 
+    /// <summary>
+    ///     Initializes a new instance of the <see cref="TemplateInlineParser" /> class.
+    /// </summary>
+    public TemplateInlineParser()
+    {
+        OpeningCharacters = new[] { '{' };
+    }
+
     /// <inheritdoc />
     public override bool Match(InlineProcessor processor, ref StringSlice slice)
     {