updated xml comments

Author: Petr Sramek

src/PolylineAlgorithm/PolylineDecoder.cs

@@ -6,10 +6,10 @@ public sealed class PolylineDecoder(ICoordinateValidator validator) : IPolylineD
     public ICoordinateValidator Validator { get; } = validator ?? throw new ArgumentNullException(nameof(validator));
 
     /// <summary>
-    /// Method decodes polyline encoded representation to coordinates.
+    /// Decodes polyline representation.
     /// </summary>
     /// <param name="source">Encoded polyline string to decode</param>
-    /// <returns>Returns coordinates.</returns>
+    /// <returns>Returns coordinates</returns>
     /// <exception cref="ArgumentException">If polyline argument is null -or- empty char array.</exception>
     /// <exception cref="InvalidOperationException">If polyline representation is not in correct format.</exception>
     public IEnumerable<(double Latitude, double Longitude)> Decode(string polyline) {

src/PolylineAlgorithm/PolylineEncoder.cs

@@ -17,13 +17,13 @@ public sealed class PolylineEncoder(ICoordinateValidator validator) : IPolylineE
         public ICoordinateValidator Validator { get; } = validator ?? throw new ArgumentNullException(nameof(validator));
 
         /// <summary>
-        /// Method encodes coordinates to polyline encoded representation
+        /// Encodes coordinates to polyline representation
         /// </summary>
         /// <param name="coordinates">Coordinates to encode</param>
         /// <returns>Polyline encoded representation</returns>
-        /// <exception cref="ArgumentException">If coordinates parameter is null</exception>
+        /// <exception cref="ArgumentNullException">If coordinates parameter is null</exception>
         /// <exception cref="ArgumentException">If coordinates parameter is empty</exception>
-        /// <exception cref="AggregateException">If one or more coordinate is out of range</exception>
+        /// <exception cref="AggregateException">If one or more coordinate is out of valid range</exception>
         public string Encode(IEnumerable<(double Latitude, double Longitude)> coordinates) {
             if (coordinates is null) {
                 throw new ArgumentNullException(nameof(coordinates));