planetarium: Reduce indentation in examples.

diff --git a/src/planetarium/planetarium.texi b/src/planetarium/planetarium.texi
index 35874ca85b7702f4d3949a3634016d1455be960b..85815b832057cce904ce25b9cfce2537e1af64d3 100644 (file)
--- a/src/planetarium/planetarium.texi
+++ b/src/planetarium/planetarium.texi
@@ -64,8 +64,8 @@ To use, startup mit-scheme-pucked and enter the following two
 s-expressions at the REPL prompt.
 
 @example
-    (load-option 'planetarium)
-    (define t (make-tellurion))
+  (load-option 'planetarium)
+  (define t (make-tellurion))
 @end example
 
 A tellurion should pop up in a new window on your desktop.
@@ -81,7 +81,7 @@ the message, apply the tellurion to three arguments: the symbol
 
 For example, to center the globe on Fairbanks, Alaska, enter this:
 @example
-    (t 'turn-to 64.844 -147.723)
+  (t 'turn-to 64.844 -147.723)
 @end example
 
 You can also have the tellurion draw the terminator as it would appear
@@ -91,16 +91,16 @@ time (an integer).  (See the reference manual's section ``Date and
 Time''.)
 
 @example
-    (t 'time-to
-       ;; a recent vernal equinox
-       (make-decoded-time 0 29 9 19 3 2016))
+  (t 'time-to
+     ;; a recent vernal equinox
+     (make-decoded-time 0 29 9 19 3 2016))
 @end example
 
 You can return the tellurion to the current time by applying it to the
 symbols @code{time-to} and @code{current}.
 
 @example
-    (t 'time-to 'current)
+  (t 'time-to 'current)
 @end example
 
 The tellurion redraws every 15 minutes to show the terminator's crawl
@@ -109,8 +109,8 @@ it to the symbol @code{stop}.  It will pick up where it left off when
 you apply it to @code{go}.
 
 @example
-    (t 'stop)
-    (t 'go)
+  (t 'stop)
+  (t 'go)
 @end example
 
 @node Terrain Viewer, GNU Free Documentation License, Introduction, Top
@@ -124,15 +124,15 @@ mit-scheme-pucked and enter the following three s-expressions at the
 REPL prompt.
 
 @example
-    (load-option 'planetarium)
-    (ge '(planetarium terrain))
-    (write-function-terrain
-     "sample-terrain.txt"
-     -3 3 50
-     -3 3 50
-     (lambda (x y)
-       (let ((d^2+1 (+ (* x x) (* y y) 1)))
-         (* 1000 (/ (sin d^2+1) d^2+1)))))
+  (load-option 'planetarium)
+  (ge '(planetarium terrain))
+  (write-function-terrain
+   "sample-terrain.txt"
+   -3 3 50
+   -3 3 50
+   (lambda (x y)
+     (let ((d^2+1 (+ (* x x) (* y y) 1)))
+       (* 1000 (/ (sin d^2+1) d^2+1)))))
 @end example
 
 A @file{sample-terrain.txt} file will be created in the current
@@ -143,14 +143,14 @@ is interpreted as meters given degrees of longitude and latitude.
 To view your sample terrain enter the following four s-expressions.
 
 @example
-    (define v (make-terrain
-               'filename "sample-terrain.txt"
-               'rows 50 'columns 50
-               'latitude 0. 'longitude 0.
-               'step .001))
-    (v 'position -.02 -.02 4000.)
-    (v 'heading 45.)
-    (v 'tilt -40.)
+  (define v (make-terrain
+             'filename "sample-terrain.txt"
+             'rows 50 'columns 50
+             'latitude 0. 'longitude 0.
+             'step .001))
+  (v 'position -.02 -.02 4000.)
+  (v 'heading 45.)
+  (v 'tilt -40.)
 @end example
 
 A viewer window should appear and display an image like
@@ -169,16 +169,16 @@ grid across 1 degree of latitude and longitude centered on Monterey
 Bay, California.
 
 @example
-    #!/bin/bash
-    mit-scheme-pucked --batch-mode <<\EOF
-    (begin
-      (load-option 'planetarium)
-      (request-google-elevations "monterey.txt"
-                                 (make-latitudes/longitudes
-                                  (iota 101 36. .01)
-                                  (iota 101 -122.5 .01)))
-      )
-    EOF
+  #!/bin/bash
+  mit-scheme-pucked --batch-mode <<\EOF
+  (begin
+    (load-option 'planetarium)
+    (request-google-elevations "monterey.txt"
+                               (make-latitudes/longitudes
+                                (iota 101 36. .01)
+                                (iota 101 -122.5 .01)))
+    )
+  EOF
 @end example
 
 You might name the script @file{~/job.sh} and run it in the background
@@ -189,8 +189,8 @@ request elevations only as fast as Google's free service allows, so
 you might wait an entire day for 10201 elevations to download.
 
 @example
-    $ chmod +x ~/job.sh
-    $ echo "~/job.sh" | at now
+  $ chmod +x ~/job.sh
+  $ echo "~/job.sh" | at now
 @end example
 
 Tomorrow, after you get email saying your job has successfully
@@ -198,14 +198,14 @@ completed, you can view the data by entering the following four
 s-expressions.
 
 @example
-    (ge '(planetarium terrain))
-    (define v (make-terrain
-               'filename "monterey.txt" 'rows 101 'columns 101
-               'latitude 36. 'longitude -122.5 'step .01
-               'color-function height-color))
-    (v 'position 36.5 -122.7 15000.)
-    (v 'heading 85.)
-    (v 'tilt -25.)
+  (ge '(planetarium terrain))
+  (define v (make-terrain
+             'filename "monterey.txt" 'rows 101 'columns 101
+             'latitude 36. 'longitude -122.5 'step .01
+             'color-function height-color))
+  (v 'position 36.5 -122.7 15000.)
+  (v 'heading 85.)
+  (v 'tilt -25.)
 @end example
 
 A viewer window should appear and display an image like