doc: Use the recommended Scheme format.

Apply the recommended formatting rules from '.dir-locals.el' to the
examples in the manual in order to fulfill it's purpose of being a
reference.

* doc/package-hello.scm: Indent it.
* doc/guix.texi (Defining Packages, Version Numbers): Likewise.
* gnu/packages/base.scm (hello): Be consistent with the manual.

doc/guix.texi

@@ -1963,13 +1963,14 @@ package looks like this:
 (define-public hello
   (package
     (name "hello")
-    (version "2.8")
+    (version "2.10")
     (source (origin
-             (method url-fetch)
-             (uri (string-append "mirror://gnu/hello/hello-" version
-                                 ".tar.gz"))
-             (sha256
-              (base32 "0wqd8sjmxfskrflaxywc7gqw7sfawrfvdxd9skxawzfgyy0pzdz6"))))
+              (method url-fetch)
+              (uri (string-append "mirror://gnu/hello/hello-" version
+                                  ".tar.gz"))
+              (sha256
+               (base32
+                "0ssi1wpaf7plaswqqjwigppsg5fyh99vdlb9kzl7c9lng89ndq1i"))))
     (build-system gnu-build-system)
     (arguments `(#:configure-flags '("--enable-silent-rules")))
     (inputs `(("gawk" ,gawk)))
@@ -7232,22 +7233,22 @@ For instance, the versions 2.24.20 and 3.9.12 of GTK+ may be packaged as follows
 @example
 (define-public gtk+
   (package
-   (name "gtk+")
-   (version "3.9.12")
-   ...))
+    (name "gtk+")
+    (version "3.9.12")
+    ...))
 (define-public gtk+-2
   (package
-   (name "gtk+")
-   (version "2.24.20")
-   ...))
+    (name "gtk+")
+    (version "2.24.20")
+    ...))
 @end example
 If we also wanted GTK+ 3.8.2, this would be packaged as
 @example
 (define-public gtk+-3.8
   (package
-   (name "gtk+")
-   (version "3.8.2")
-   ...))
+    (name "gtk+")
+    (version "3.8.2")
+    ...))
 @end example
 
 

doc/package-hello.scm

@@ -4,13 +4,14 @@
 
 (package
   (name "hello")
-  (version "2.8")
+  (version "2.10")
   (source (origin
             (method url-fetch)
             (uri (string-append "mirror://gnu/hello/hello-" version
                                 ".tar.gz"))
             (sha256
-             (base32 "0wqd8sjmxfskrflaxywc7gqw7sfawrfvdxd9skxawzfgyy0pzdz6"))))
+             (base32
+              "0ssi1wpaf7plaswqqjwigppsg5fyh99vdlb9kzl7c9lng89ndq1i"))))
   (build-system gnu-build-system)
   (synopsis "Hello, GNU world: An example GNU package")
   (description "Guess what GNU Hello prints!")

gnu/packages/base.scm

@@ -49,22 +49,23 @@
 
 (define-public hello
   (package
-   (name "hello")
-   (version "2.10")
-   (source (origin
-            (method url-fetch)
-            (uri (string-append "mirror://gnu/hello/hello-" version
-                                ".tar.gz"))
-            (sha256
-             (base32 "0ssi1wpaf7plaswqqjwigppsg5fyh99vdlb9kzl7c9lng89ndq1i"))))
-   (build-system gnu-build-system)
-   (synopsis "Hello, GNU world: An example GNU package")
-   (description
-    "GNU Hello prints the message \"Hello, world!\" and then exits.  It
+    (name "hello")
+    (version "2.10")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append "mirror://gnu/hello/hello-" version
+                                  ".tar.gz"))
+              (sha256
+               (base32
+                "0ssi1wpaf7plaswqqjwigppsg5fyh99vdlb9kzl7c9lng89ndq1i"))))
+    (build-system gnu-build-system)
+    (synopsis "Hello, GNU world: An example GNU package")
+    (description
+     "GNU Hello prints the message \"Hello, world!\" and then exits.  It
 serves as an example of standard GNU coding practices.  As such, it supports
 command-line arguments, multiple languages, and so on.")
-   (home-page "http://www.gnu.org/software/hello/")
-   (license gpl3+)))
+    (home-page "http://www.gnu.org/software/hello/")
+    (license gpl3+)))
 
 (define-public grep
   (package