docs egenration tests

Author: petesramek

src/PolylineAlgorithm/Polyline.cs

@@ -21,6 +21,20 @@ namespace PolylineAlgorithm;
 public readonly struct Polyline : IEquatable<Polyline> {
     private readonly ReadOnlyMemory<char> _value;
 
+    /// <summary>
+    /// Initializes a new instance of the <see cref="Polyline"/> struct with the specified character sequence.
+    /// </summary>
+    /// <param name="value">
+    /// A read-only span of characters representing an encoded polyline.
+    /// </param>
+    public Polyline(ReadOnlySpan<char> value) {
+        if (value.IsEmpty) {
+            _value = ReadOnlyMemory<char>.Empty;
+        } else {
+            _value = new ReadOnlyMemory<char>(value.ToArray());
+        }
+    }
+
     /// <summary>
     /// Initializes a new, empty instance of the <see cref="Polyline"/> struct.
     /// </summary>