Actually add Chapter 21 to the build system

marijnh · marijnh · commit fe0c433ebbfe · 2014-07-16T18:40:08.000+02:00
diff --git a/05_higher_order.txt b/05_higher_order.txt
@@ -927,7 +927,7 @@ array to `average`.
 
 When we looked up all the people in our data set that lived more than
 ninety years, only the very latest generation in the data came out.
-Let us take a closer look at that phenomenon.
+Let's take a closer look at that phenomenon.
 
 Compute and output the average age of the people in the ancestry data
 set per century. A person is assigned to a century by taking their
diff --git a/06_object.txt b/06_object.txt
@@ -17,7 +17,7 @@ When a programmer says “object”, this is a loaded term. In my profession, ob
 are a way of life, the subject of holy wars, and a
 beloved buzzword that still hasn't quite lost its power.
 
-To an outsider, this is probably a little confusing. Let us start with
+To an outsider, this is probably a little confusing. Let's start with
 a brief history of objects as a programming construct.
 
 == History ==
diff --git a/07_elife.txt b/07_elife.txt
@@ -969,7 +969,7 @@ var valley = new LifelikeWorld(
 );
 ----
 
-Let us see what happens if we run this. !!tex These snapshots
+Let's see what happens if we run this. !!tex These snapshots
 illustrate a typical run of this world.!!
 
 ifdef::html_target[]
diff --git a/08_error.txt b/08_error.txt
@@ -581,7 +581,7 @@ that's a shaky way to write code—we'd be using information that's intended
 for human consumption (the message) to make a programmatic decision. As soon as
 someone changes (or translates) the message, the code will stop working.
 
-Rather, let us define a new type of error, and use `instanceof` to
+Rather, let's define a new type of error, and use `instanceof` to
 identify it.
 
 // include_code
diff --git a/11_language.txt b/11_language.txt
@@ -305,7 +305,7 @@ language yet.
 
 The `specialForms` object is used to define special syntax in Egg.
 It associates words with functions that evaluate such
-special forms. It is currently empty. Let us add some forms.
+special forms. It is currently empty. Let's add some forms.
 
 // include_code
 
diff --git a/20_node.txt b/20_node.txt
@@ -210,7 +210,7 @@ module, and `require("elife")` will try to load the library found in
 `node_modules/elife/`. A common way to install such libraries is by
 using NMP, which I will discuss in a moment.
 
-To illustrate the use of `require`, let us set up a simple project
+To illustrate the use of `require`, let's set up a simple project
 consisting of two files. The first one is called `main.js`, which
 defines a script that can be called from the command line to garble a
 string.
@@ -537,7 +537,7 @@ document when the `"end"` event occurs.
 A file can be read as a readable stream by using the
 `fs.createReadStream` function.
 
-Let us set up a server that reads request bodies, and streams them
+Let's set up a server that reads request bodies, and streams them
 back to the client as all-uppercase text.
 
 [source,javascript]
@@ -585,7 +585,7 @@ using `console.log` would cause undesirable line breaks in the output.
 
 == A simple file server ==
 
-Let us combine our newfound knowledge about HTTP servers and talking
+Let's combine our newfound knowledge about HTTP servers and talking
 to the file system, and create a bridge between them: an HTTP server
 that allows remote access to a file system. Such a server has many
 uses—it could be used by a web application to store data, or even to
diff --git a/21_skillsharing.txt b/21_skillsharing.txt
@@ -1,7 +1,7 @@
 :chap_num: 21
 :prev_link: 20_node
 
-= Project: Meetup Organizer =
+= Project: Organizing a Meetup =
 
 A _skill-sharing_ meeting is an event where people with a shared
 interest come together and give small, informal presentations about
diff --git a/Makefile b/Makefile
@@ -2,7 +2,7 @@ all: html tex
 
 CHAPTERS := 00_intro 01_values 02_program_structure 03_functions 04_data 05_higher_order 06_object \
   07_elife 08_error 09_regexp 10_modules 11_language 12_browser 13_dom 14_event 15_game 16_canvas \
-  17_http 18_forms 19_paint 20_node
+  17_http 18_forms 19_paint 20_node 21_skillsharing
 
 .SECONDARY: $(foreach CHAP,$(CHAPTERS),tex/$(CHAP).db)
 
diff --git a/html/index.html b/html/index.html
@@ -70,6 +70,7 @@ <h3>(Part 2: Browser)</h3>
       <h3>(Part 3: Node)</h3>
       <a href="20_node.html">Node.js</a>
     </li>
+    <li><a href="21_skillsharing.html">Project: Organizing a Meetup</a>
   </ol>
 
   <h2>Other pages</h2>
