Silence some doc errors in VS2019.

OpenRA.Game/Activities/Activity.cs

@@ -135,6 +135,7 @@ namespace OpenRA.Activities
 		/// Call this method from any place that's called during a tick, such as the Tick() method itself or
 		/// the Before(First|Last)Run() methods. The origin activity will be marked in the output.
 		/// </summary>
+		/// <param name="self">The actor performing this activity.</param>
 		/// <param name="origin">Activity from which to start traversing, and which to mark. If null, mark the calling activity, and start traversal from the top.</param>
 		/// <param name="level">Initial level of indentation.</param>
 		protected void PrintActivityTree(Actor self, Activity origin = null, int level = 0)

OpenRA.Mods.Common/Traits/Conditions/ConditionManager.cs

@@ -114,9 +114,12 @@ namespace OpenRA.Mods.Common.Traits
 			return token;
 		}
 
-		/// <summary>Revokes a previously granted condition.</summary>
+		/// <summary>
-		/// <returns>The invalid token ID.</returns>
+		/// Revokes a previously granted condition.
+		/// </summary>
+		/// <param name="self">The actor to which this trait is attached.</param>
 		/// <param name="token">The token ID returned by GrantCondition.</param>
+		/// <returns>The invalid token ID.</returns>
 		public int RevokeCondition(Actor self, int token)
 		{
 			string condition;

OpenRA.Mods.Common/Traits/World/DomainIndex.cs

@@ -51,7 +51,7 @@ namespace OpenRA.Mods.Common.Traits
 			return domainIndexes[movementClass].IsPassable(p1, p2);
 		}
 
-		/// Regenerate the domain index for a group of cells
+		/// <summary>Regenerate the domain index for a group of cells.</summary>
 		public void UpdateCells(World world, IEnumerable<CPos> cells)
 		{
 			var dirty = cells.ToHashSet();

OpenRA.Mods.Common/Traits/World/ResourceClaimLayer.cs

@@ -59,7 +59,6 @@ namespace OpenRA.Mods.Common.Traits
 		/// <summary>
 		/// Release the last resource claim made by this actor.
 		/// </summary>
-		/// <param name="claimer"></param>
 		public void RemoveClaim(Actor claimer)
 		{
 			CPos lastClaim;

OpenRA.ruleset

@@ -42,5 +42,12 @@
     <Rule Id="SA1214" Action="None" /><!-- ReadonlyElementsMustAppearBeforeNonReadonlyElements -->
     <Rule Id="SA1413" Action="None" /><!-- UseTrailingCommasInMultiLineInitializers -->
     <Rule Id="SA1516" Action="None" /><!-- ElementsMustBeSeparatedByBlankLine -->
+    <Rule Id="SA1604" Action="None" /><!-- ElementDocumentationShouldHaveSummary -->
+    <Rule Id="SA1611" Action="None" /><!-- ElementParametersShouldBeDocumented -->
+    <Rule Id="SA1615" Action="None" /><!-- ElementReturnValueShouldBeDocumented -->
+    <Rule Id="SA1618" Action="None" /><!-- GenericTypeParametersShouldBeDocumented -->
+    <Rule Id="SA1623" Action="None" /><!-- PropertySummaryDocumentationShouldMatchAccessors -->
+    <Rule Id="SA1629" Action="None" /><!-- DocumentationTextShouldEndWithAPeriod -->
+    <Rule Id="SA1642" Action="None" /><!-- ConstructorSummaryDocumentationShouldBeginWithStandardText -->
   </Rules>
 </RuleSet>