Fix two typos (freechipsproject#149)

Author: wunderabt

2.6_chiseltest.ipynb

@@ -182,7 +182,7 @@
     "built into the process.\n",
     "\n",
     "The `poke` and `expect` methods are now part of each individual `io` element.\n",
-    "This gives important hints the the tester to make better checking of types.\n",
+    "This gives important hints to the tester to make better checking of types.\n",
     "The `peek` and `step` operations are also now methods on `io` elements.\n",
     "\n",
     "Another difference is that values poked and expected are Chisel literals.\n",
@@ -466,7 +466,7 @@
     "\n",
     "Also introduced here is the new Chisel3 `Bundle` literal notation. Consider the line\n",
     "```scala\n",
-    "new GcdInputBundle(16)).Lit(_.value1 -> x.U, _.value2 -> y.U)\n",
+    "new GcdInputBundle(16).Lit(_.value1 -> x.U, _.value2 -> y.U)\n",
     "```\n",
     "`GcdInputBundle` defined above has two fields `value1` and `value2`.\n",
     "We create a bundle literal by first creating a bundle then calling its `.Lit` method.\n",