Adjust GetParameterSpan xml comment

Author: fredericDelaporte

src/NHibernate/Impl/FilterImpl.cs

@@ -102,12 +102,12 @@ public object GetParameter(string name)
 		}
 
 		/// <summary>
-		/// Get a span of collection parameter by name. <see langword="null" /> if the parameter is not a collectino or
-		/// there is no such parameter exist.
+		/// Get the span of a value list parameter by name. <see langword="null" /> if the parameter is not a value list
+		/// or if there is no such parameter.
 		/// </summary>
 		/// <param name="name">The parameter name.</param>
-		/// <returns>The parameter span, or <see langword="null" /> if the parameter is not a collectino or
-		/// there is no such parameter exist.</returns>
+		/// <returns>The parameter span, or <see langword="null" /> if the parameter is not a value list or
+		/// if there is no such parameter.</returns>
 		public int? GetParameterSpan(string name)
 		{
 			return _parameterSpans.TryGetValue(name, out var result) ? result : default(int?);