Fix typo in "InheritenceSpec"

Tests/StencilTests/InheritanceSpec.swift

@@ -0,0 +1,36 @@
+import PathKit
+import Spectre
+import Stencil
+import XCTest
+
+final class InheritanceTests: XCTestCase {
+  let path = Path(#file) + ".." + "fixtures"
+  lazy var loader = FileSystemLoader(paths: [path])
+  lazy var environment = Environment(loader: loader)
+
+  func testInheritance() {
+    it("can inherit from another template") {
+      let template = try self.environment.loadTemplate(name: "child.html")
+      try expect(try template.render()) == """
+        Super_Header Child_Header
+        Child_Body
+        """
+    }
+
+    it("can inherit from another template inheriting from another template") {
+      let template = try self.environment.loadTemplate(name: "child-child.html")
+      try expect(try template.render()) == """
+        Super_Header Child_Header Child_Child_Header
+        Child_Body
+        """
+    }
+
+    it("can inherit from a template that calls a super block") {
+      let template = try self.environment.loadTemplate(name: "child-super.html")
+      try expect(try template.render()) == """
+        Header
+        Child_Body
+        """
+    }
+  }
+}