189/376: Tweak some chapter titles

[Ludovic Courtès]

civodul pushed a commit to tag 1.8
in repository guix.

commit 57f6463ec03c3399f8bd682cecab27ff1671d21d
Author: Eelco Dolstra <address@hidden>
Date:   Tue Sep 16 14:38:37 2014 +0200

    Tweak some chapter titles
---
 doc/manual/expressions/writing-nix-expressions.xml |    2 +-
 doc/manual/introduction/about-nix.xml              |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/doc/manual/expressions/writing-nix-expressions.xml 
b/doc/manual/expressions/writing-nix-expressions.xml
index 6d64f24..6b797c2 100644
--- a/doc/manual/expressions/writing-nix-expressions.xml
+++ b/doc/manual/expressions/writing-nix-expressions.xml
@@ -4,7 +4,7 @@
       version="5.0"
       xml:id='chap-writing-nix-expressions'>
 
-<title>Nix Expressions</title>
+<title>Writing Nix Expressions</title>
 
 <partintro>
 <para>This chapter shows you how to write Nix expressions, which 
diff --git a/doc/manual/introduction/about-nix.xml 
b/doc/manual/introduction/about-nix.xml
index 0346934..4860b3d 100644
--- a/doc/manual/introduction/about-nix.xml
+++ b/doc/manual/introduction/about-nix.xml
@@ -4,7 +4,7 @@
       version="5.0"
       xml:id="ch-about-nix">
 
-<title>About Nix</title>
+<title>Introduction</title>
 
 <para>Nix is a <emphasis>purely functional package manager</emphasis>.
 This means that it treats packages like values in purely functional