Bugfix: Correct word-level generation to be a sliding-window

MarkovGrams/UnweightedMarkovChain.cs

@@ -77,7 +77,7 @@ namespace MarkovGrams
 			while((Mode == GenerationMode.CharacterLevel ? result.Length : result.Split(' ').Length) < length)
 			{
 				// The substring that the next ngram in the chain needs to start with
-				string nextStartsWith = Mode == GenerationMode.CharacterLevel ? lastNgram.Substring(1) : lastNgram.Split(' ').Last();
+				string nextStartsWith = Mode == GenerationMode.CharacterLevel ? lastNgram.Substring(1) : string.Join(" ", lastNgram.Split(' ').Skip(1));
 				// Get a list of possible n-grams we could choose from next
 				List<string> nextNgrams = ngrams.FindAll(gram => gram.StartsWith(nextStartsWith));
 				choiceCounts.Add(nextNgrams.Count);
@@ -90,7 +90,7 @@ namespace MarkovGrams
 				if (Mode == GenerationMode.CharacterLevel)
 					result += nextNgram[nextNgram.Length - 1];
 				else
-					result += ' ' + string.Join(" ", nextNgram.Split(' ').Skip(1));
+					result += ' ' + nextNgram.Split(' ').Last();
 				
 				lastNgram = nextNgram; i++;
 			}

MarkovGrams/WeightedMarkovChain.cs

@@ -92,7 +92,7 @@ namespace MarkovGrams
 			{
 				wrandom.ClearContents();
 				// The substring that the next ngram in the chain needs to start with
-				string nextStartsWith = Mode == GenerationMode.CharacterLevel ? lastNgram.Substring(1) : lastNgram.Split(' ').Last();
+				string nextStartsWith = Mode == GenerationMode.CharacterLevel ? lastNgram.Substring(1) : string.Join(" ", lastNgram.Split(' ').Skip(1));
 				// Get a list of possible n-grams we could choose from next
 				Dictionary<string, double> convNextNgrams = new Dictionary<string, double>();
 				ngrams.Where(gram_data => gram_data.Key.StartsWith(nextStartsWith))
@@ -109,7 +109,7 @@ namespace MarkovGrams
 				if (Mode == GenerationMode.CharacterLevel)
 					result += nextNgram[nextNgram.Length - 1];
 				else
-					result += ' ' + string.Join(" ", nextNgram.Split(' ').Skip(1));
+					result += ' ' + nextNgram.Split(' ').Last();
 				lastNgram = nextNgram; i++;
 			}
 			wrandom.ClearContents();