Added context rule for I

Change-Id: I5f3449c3994960503b616fa735de9d2ab9951ff7
diff --git a/matrix_test.go b/matrix_test.go
index 91f5b3c..31812d7 100644
--- a/matrix_test.go
+++ b/matrix_test.go
@@ -1013,17 +1013,14 @@
 	assert.Equal("pp.", tokens[28])
 	assert.Equal("17-18", tokens[29])
 	assert.Equal(".", tokens[30])
-	/*
 
-		// englishTokenizerCanGuessWhetherIIsAbbrev
-		tokens = ttokenize(mat_en, w, "M. I. Baxter was born during World War I. So was I. He went to the Peter I. Hardy school. So did I.")
-		assert.Equal("I.", tokens[1])
-		assert.Equal("I", tokens[8])
-		assert.Equal(".", tokens[9])
-		assert.Equal("I", tokens[12])
-		assert.Equal(".", tokens[13])
-
-	*/
+	// englishTokenizerCanGuessWhetherIIsAbbrev
+	tokens = ttokenize(mat_en, w, "M. I. Baxter was born during World War I. So was I. He went to the Peter I. Hardy school. So did I.")
+	assert.Equal("I.", tokens[1])
+	assert.Equal("I", tokens[8])
+	assert.Equal(".", tokens[9])
+	assert.Equal("I", tokens[12])
+	assert.Equal(".", tokens[13])
 
 	/*
 		@Test