diff --git a/aws/aws.ipynb b/aws/aws.ipynb
index d149034..87bc93d 100644
--- a/aws/aws.ipynb
+++ b/aws/aws.ipynb
@@ -4,7 +4,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<small><i>This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://github.com/donnemartin/data-science-ipython-notebooks).</i></small>"
+    "This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://github.com/donnemartin/data-science-ipython-notebooks)."
    ]
   },
   {
diff --git a/commands/linux.ipynb b/commands/linux.ipynb
index 8cb8fe8..d3b988e 100644
--- a/commands/linux.ipynb
+++ b/commands/linux.ipynb
@@ -4,7 +4,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<small><i>This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://github.com/donnemartin/data-science-ipython-notebooks).</i></small>"
+    "This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://github.com/donnemartin/data-science-ipython-notebooks)."
    ]
   },
   {
diff --git a/commands/misc.ipynb b/commands/misc.ipynb
index c13309e..009c9b4 100644
--- a/commands/misc.ipynb
+++ b/commands/misc.ipynb
@@ -4,7 +4,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<small><i>This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://github.com/donnemartin/data-science-ipython-notebooks).</i></small>"
+    "This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://github.com/donnemartin/data-science-ipython-notebooks)."
    ]
   },
   {
diff --git a/mapreduce/mapreduce-python.ipynb b/mapreduce/mapreduce-python.ipynb
index 1676ad4..c77c2f0 100644
--- a/mapreduce/mapreduce-python.ipynb
+++ b/mapreduce/mapreduce-python.ipynb
@@ -4,7 +4,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<small><i>This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://github.com/donnemartin/data-science-ipython-notebooks).</i></small>"
+    "This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://github.com/donnemartin/data-science-ipython-notebooks)."
    ]
   },
   {
diff --git a/matplotlib/matplotlib-applied.ipynb b/matplotlib/matplotlib-applied.ipynb
index 8b3b441..dbf0779 100644
--- a/matplotlib/matplotlib-applied.ipynb
+++ b/matplotlib/matplotlib-applied.ipynb
@@ -4,7 +4,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<small><i>This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://github.com/donnemartin/data-science-ipython-notebooks).</i></small>"
+    "This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://github.com/donnemartin/data-science-ipython-notebooks)."
    ]
   },
   {
diff --git a/pandas/pandas.ipynb b/pandas/pandas.ipynb
index 1c082f8..013934c 100644
--- a/pandas/pandas.ipynb
+++ b/pandas/pandas.ipynb
@@ -4,7 +4,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<small><i>This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://github.com/donnemartin/data-science-ipython-notebooks).</i></small>"
+    "This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://github.com/donnemartin/data-science-ipython-notebooks)."
    ]
   },
   {
diff --git a/python-data/datetime.ipynb b/python-data/datetime.ipynb
index b7de80c..e12969b 100644
--- a/python-data/datetime.ipynb
+++ b/python-data/datetime.ipynb
@@ -4,7 +4,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<small><i>This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://github.com/donnemartin/data-science-ipython-notebooks).</i></small>"
+    "This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://github.com/donnemartin/data-science-ipython-notebooks)."
    ]
   },
   {
diff --git a/python-data/files.ipynb b/python-data/files.ipynb
index abadec1..acb5a7e 100644
--- a/python-data/files.ipynb
+++ b/python-data/files.ipynb
@@ -4,7 +4,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<small><i>This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://github.com/donnemartin/data-science-ipython-notebooks).</i></small>"
+    "This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://github.com/donnemartin/data-science-ipython-notebooks)."
    ]
   },
   {
diff --git a/python-data/functions.ipynb b/python-data/functions.ipynb
index 0606437..1d03e82 100644
--- a/python-data/functions.ipynb
+++ b/python-data/functions.ipynb
@@ -4,7 +4,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<small><i>This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://github.com/donnemartin/data-science-ipython-notebooks).</i></small>"
+    "This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://github.com/donnemartin/data-science-ipython-notebooks)."
    ]
   },
   {
diff --git a/python-data/logs.ipynb b/python-data/logs.ipynb
index 5b717c7..3e58510 100644
--- a/python-data/logs.ipynb
+++ b/python-data/logs.ipynb
@@ -4,7 +4,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<small><i>This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://github.com/donnemartin/data-science-ipython-notebooks).</i></small>"
+    "This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://github.com/donnemartin/data-science-ipython-notebooks)."
    ]
   },
   {
diff --git a/python-data/pdb.ipynb b/python-data/pdb.ipynb
index 4da519c..5aad141 100644
--- a/python-data/pdb.ipynb
+++ b/python-data/pdb.ipynb
@@ -4,7 +4,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<small><i>This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://github.com/donnemartin/data-science-ipython-notebooks).</i></small>"
+    "This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://github.com/donnemartin/data-science-ipython-notebooks)."
    ]
   },
   {
diff --git a/python-data/structs.ipynb b/python-data/structs.ipynb
index b48e627..83eb266 100644
--- a/python-data/structs.ipynb
+++ b/python-data/structs.ipynb
@@ -4,7 +4,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<small><i>This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://github.com/donnemartin/data-science-ipython-notebooks).</i></small>"
+    "This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://github.com/donnemartin/data-science-ipython-notebooks)."
    ]
   },
   {
diff --git a/python-data/structs_utils.ipynb b/python-data/structs_utils.ipynb
index 62497c1..20d545d 100644
--- a/python-data/structs_utils.ipynb
+++ b/python-data/structs_utils.ipynb
@@ -4,7 +4,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<small><i>This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://github.com/donnemartin/data-science-ipython-notebooks).</i></small>"
+    "This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://github.com/donnemartin/data-science-ipython-notebooks)."
    ]
   },
   {
diff --git a/python-data/unit_tests.ipynb b/python-data/unit_tests.ipynb
index e16f903..32854b6 100644
--- a/python-data/unit_tests.ipynb
+++ b/python-data/unit_tests.ipynb
@@ -4,7 +4,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<small><i>This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://github.com/donnemartin/data-science-ipython-notebooks).</i></small>"
+    "This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://github.com/donnemartin/data-science-ipython-notebooks)."
    ]
   },
   {
diff --git a/spark/hdfs.ipynb b/spark/hdfs.ipynb
index e971f38..9b6afe3 100644
--- a/spark/hdfs.ipynb
+++ b/spark/hdfs.ipynb
@@ -4,7 +4,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<small><i>This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://github.com/donnemartin/data-science-ipython-notebooks).</i></small>"
+    "This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://github.com/donnemartin/data-science-ipython-notebooks)."
    ]
   },
   {
diff --git a/spark/spark.ipynb b/spark/spark.ipynb
index c0f9c28..9723b4f 100644
--- a/spark/spark.ipynb
+++ b/spark/spark.ipynb
@@ -4,7 +4,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<small><i>This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://github.com/donnemartin/data-science-ipython-notebooks).</i></small>"
+    "This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://github.com/donnemartin/data-science-ipython-notebooks)."
    ]
   },
   {