Fix spelling

src/Workspaces/Core/Portable/FindSymbols/FindReferences/DependentTypeFinder.cs

@@ -174,7 +174,7 @@ internal static partial class DependentTypeFinder
             // We might miss a derived type in C if there's an intermediate derived type
             // in B.
             //
-            // However, say we have projects A <- B <- C <- D, only only projects A and C
+            // However, say we have projects A <- B <- C <- D, only projects A and C
             // are passed in.  There is no need to check D as there's no way it could
             // contribute an intermediate type that affects A or C.  We only need to check
             // A, B and C
@@ -187,7 +187,7 @@ internal static partial class DependentTypeFinder
             // and the list of projects the caller wants to search, find the actual list of
             // projects we need to search through.
             //
-            // This list of projects is properly topologicaly ordered.  Because of this we
+            // This list of projects is properly topologically ordered.  Because of this we
             // can just process them in order from first to last because we know no project
             // in this list could affect a prior project.
             var orderedProjectsToExamine = GetOrderedProjectsToExamine(
@@ -198,7 +198,7 @@ internal static partial class DependentTypeFinder
             using var _1 = GetSymbolSet(out var result);
 
             // The current total set of matching metadata types in the descendant tree (including the initial type if it
-            // is from metadata).  Will be used when examining new types to see if they inherit from any of htese.
+            // is from metadata).  Will be used when examining new types to see if they inherit from any of these.
             using var _2 = GetSymbolSet(out var currentMetadataTypes);
 
             // Same as above, but contains source types as well.
@@ -558,7 +558,7 @@ private static bool TypeHasInterfaceInSet(INamedTypeSymbol type, SymbolSet set)
 
             // We're going to be sweeping over this project over and over until we reach a 
             // fixed point.  In order to limit GC and excess work, we cache all the semantic
-            // models and DeclaredSymbolInfo for hte documents we look at.
+            // models and DeclaredSymbolInfo for the documents we look at.
             // Because we're only processing a project at a time, this is not an issue.
             var cachedModels = new ConcurrentSet<SemanticModel>();