add in a nutshell to notes pages (see #2395)

lessons/Core/contracts-strings-images/langs/en-us/pages/notes-DUPLICATE-intro-to-programming.adoc

@@ -1,4 +1,4 @@
-= Introduction to Programming
+= Introduction to Programming in a Nutshell
 
 The *Editor* is a software program we use to write Code. Our Editor allows us to experiment with Code on the right-hand side, in the *Interactions Area*. For Code that we want to _keep_, we can put it on the left-hand side in the *Definitions Area*. Clicking the "Run" button causes the computer to re-read everything in the Definitions Area and erase anything that was typed into the Interactions Area.
 

lessons/Core/defining-values/langs/en-us/pages/notes-defining-values.adoc

@@ -1,4 +1,4 @@
-= Defining Values
+= Defining Values in a Nutshell
 
 In math, we use values, expressions and definitions.
 

lessons/Core/function-composition/langs/en-us/pages/notes-DUPLICATE-intro-to-programming.adoc

@@ -1,4 +1,4 @@
-= Introduction to Programming
+= Introduction to Programming in a Nutshell
 
 The *Editor* is a software program we use to write Code. Our Editor allows us to experiment with Code on the right-hand side, in the *Interactions Area*. For Code that we want to _keep_, we can put it on the left-hand side in the *Definitions Area*. Clicking the "Run" button causes the computer to re-read everything in the Definitions Area and erase anything that was typed into the Interactions Area.
 

lessons/Core/functions-dr/langs/en-us/pages/notes-solving-word-problems.adoc

@@ -1,4 +1,4 @@
-= Solving Word Problems
+= Solving Word Problems in a Nutshell
 
 Being able to see functions as Contracts, Examples or Definitions is like having three powerful tools. These representations can be used together to solve word problems! We call this *The Design Recipe*.
 

lessons/Core/functions-examples-definitions/langs/en-us/pages/notes-DUPLICATE-defining-functions.adoc

@@ -1,4 +1,4 @@
-= Defining Functions
+= Defining Functions in a Nutshell
 
 Functions can be viewed in _multiple representations_. You already know one of them: @vocab{Contracts}, which specify the Name, Domain, and Range of a function. Contracts are a way of thinking of functions as a _mapping_ between one set of data and another. For example, a mapping from Numbers to Strings:
 

lessons/Core/functions-make-life-easier/langs/en-us/pages/notes-defining-functions.adoc

@@ -1,4 +1,4 @@
-= Defining Functions
+= Defining Functions in a Nutshell
 
 Functions can be viewed in _multiple representations_. You already know one of them: @vocab{Contracts}, which specify the Name, Domain, and Range of a function. Contracts are a way of thinking of functions as a _mapping_ between one set of data and another. For example, a mapping from Numbers to Strings:
 

lessons/Core/piecewise-functions-conditionals/langs/en-us/pages/notes-piecewise-functions.adoc

@@ -1,4 +1,4 @@
-= Piecewise Functions
+= Piecewise Functions in a Nutshell
 
 
 - Sometimes we want to build functions that act differently for different inputs. For example, suppose a business charges $10/pizza, but only $5/pizza for orders of six or more. How could we write a function that computes the total price based on the number of pizzas?

lessons/Core/simple-data-types/langs/en-us/pages/notes-intro-to-programming.adoc

@@ -1,4 +1,4 @@
-= Introduction to Programming
+= Introduction to Programming in a Nutshell
 
 The *Editor* is a software program we use to write Code. Our Editor allows us to experiment with Code on the right-hand side, in the *Interactions Area*. For Code that we want to _keep_, we can put it on the left-hand side in the *Definitions Area*. Clicking the "Run" button causes the computer to re-read everything in the Definitions Area and erase anything that was typed into the Interactions Area.
 

lessons/Data-Science/advanced-visualizations/langs/en-us/pages/notes-advanced-visualizations.adoc

@@ -1,4 +1,4 @@
-= Advanced Visualizations in a Nutshell
+= Advanced Data Visualizations in a Nutshell
 ++++
 <style>
 body code { line-height: 16px !important; }

lessons/Data-Science/bar-and-pie-charts/langs/en-us/pages/notes-plotting-and-displaying-data.adoc

@@ -1,4 +1,4 @@
-= Displaying Categorical Data
+= Displaying Categorical Data in a Nutshell
 
 @vspace{1ex}
 
@@ -8,6 +8,8 @@ Data Scientists use *data visualizations* to interpret data. You've probably see
 
 When it comes to displaying *Categorical Data*, there are two visualizations that are especially useful:
 
+@vspace{1ex}
+
 1. *Bar charts* show the _count or percentage_ of rows in each category.
 * Bar charts provide a visual representation of the frequency of values in a categorical column. 
 * Bar charts have a bar for every category in a column.

lessons/Data-Science/contracts-tables/langs/en-us/pages/notes-DUPLICATE-intro-to-programming.adoc

@@ -1,4 +1,4 @@
-= Introduction to Programming
+= Introduction to Programming in a Nutshell
 
 The *Editor* is a software program we use to write Code. Our Editor allows us to experiment with Code on the right-hand side, in the *Interactions Area*. For Code that we want to _keep_, we can put it on the left-hand side in the *Definitions Area*. Clicking the "Run" button causes the computer to re-read everything in the Definitions Area and erase anything that was typed into the Interactions Area.
 

lessons/Data-Science/contracts-visualizations/langs/en-us/pages/notes-DUPLICATE-intro-to-programming.adoc

@@ -1,4 +1,4 @@
-= Introduction to Programming
+= Introduction to Programming in a Nutshell
 
 The *Editor* is a software program we use to write Code. Our Editor allows us to experiment with Code on the right-hand side, in the *Interactions Area*. For Code that we want to _keep_, we can put it on the left-hand side in the *Definitions Area*. Clicking the "Run" button causes the computer to re-read everything in the Definitions Area and erase anything that was typed into the Interactions Area.
 

lessons/Data-Science/correlations/langs/en-us/pages/notes-DUPLICATE-scatter-plots.adoc

@@ -1,4 +1,4 @@
-= Correlations in Scatter Plots
+= Correlations in Scatter Plots in a Nutshell
 
 *Scatter Plots* can be used to show a relationship between two quantitative columns. Each row in the dataset is represented by a point, with one column providing the x-value and the other providing the y-value.
 

lessons/Data-Science/dot-plots-to-histograms/langs/en-us/pages/notes.adoc

@@ -1,4 +1,4 @@
-= Histograms
+= Histograms in a Nutshell
 
 *From Dot Plots to Histograms*
 

lessons/Data-Science/dot-plots/langs/en-us/pages/notes.adoc

@@ -1,4 +1,4 @@
-= Dot Plots: Distribution, Typicality, Variability
+= Dot Plots: Distribution, Typicality, Variability in a Nutshell
 
 
 A *dot plot* (below) is a data visualization consisting of data points plotted along a number line.

lessons/Data-Science/ds-intro/langs/en-us/pages/notes-intro-to-computational-ds.adoc

@@ -1,4 +1,4 @@
-= Categorical and Quantitative Data
+= Categorical and Quantitative Data in a Nutshell
 
 Many important questions (“What’s the best restaurant in town?”, “Is this law good for citizens?”, etc.) are answered with _data_. +
 

lessons/Data-Science/filtering-and-building/langs/en-us/pages/notes-filtering-and-building.adoc

@@ -1,4 +1,4 @@
-= Advanced Table Manipulation
+= Advanced Table Manipulation in a Nutshell
 
 You've seen that Pyret has special functions that we can use to manipulate Tables:
 

lessons/Data-Science/grouped-samples/langs/en-us/pages/notes-DUPLICATE-filtering-and-building.adoc

@@ -1,4 +1,4 @@
-= Defining Row Functions & Using Table Functions
+= Defining Row Functions & Using Table Functions in a Nutshell
 
 Pyret has special functions that we can use to manipulate Tables.
 

lessons/Data-Science/histograms-interpret/langs/en-us/pages/notes-DUPLICATE-histograms.adoc

@@ -1,4 +1,4 @@
-= Histograms
+= Histograms in a Nutshell
 ++++
 <style>
 .last-list li {min-height: 80px;}

lessons/Data-Science/table-functions-dr/langs/en-us/pages/notes-defining-table-functions.adoc

@@ -1,4 +1,4 @@
-= Defining Table Functions
+= Defining Table Functions in a Nutshell
 ++++
 <style>
 body.LessonNotes li { margin-bottom: 5px; }