[gnome-builder] doc: import Gio, match spacing with other rst

[Christian Hergert <chergert src gnome org>]

commit 23bca073edaf9bef1cdd59bbc6af74e1b6405443
Author: Christian Hergert <chergert redhat com>
Date:   Wed Mar 8 20:02:10 2017 -0800

    doc: import Gio, match spacing with other rst
    
    Sort of annoying, but first tab stop is 3, then 4 after that for python.

 doc/plugins/building/buildsystem.rst |   72 +++++++++++++++++-----------------
 1 files changed, 36 insertions(+), 36 deletions(-)
---
diff --git a/doc/plugins/building/buildsystem.rst b/doc/plugins/building/buildsystem.rst
index d2912d5..e3678cc 100644
--- a/doc/plugins/building/buildsystem.rst
+++ b/doc/plugins/building/buildsystem.rst
@@ -10,42 +10,42 @@ Builder has support for many build systems such as autotools, meson, cmake, etc.
 
    import gi
 
-   from gi.repository import Ide
-
-    class BasicBuildSystem(Ide.Object, Ide.BuildSystem, Gio.AsyncInitable):
-
-        def do_init_async(self, priority, cancel, callback, data=None):
-            task = Gio.Task.new(self, cancel, callback)
-            task.set_priority(priority)
-            # do something, like check if a build file exists
-            task.return_boolean(True)
-
-        def do_init_finish(self, result):
-            return result.propagate_boolean()
-
-        def do_get_priority(self):
-            return 0 # Choose a priority based on other build systems' priority
-
-        def do_get_build_flags_async(self, ifile, cancellable, callback, data=None):
-            task = Gio.Task.new(self, cancellable, callback)
-            task.ifile = ifile
-            task.build_flags = []
-            # get the build flags
-            task.return_boolean(True)
-
-        def do_get_build_flags_finish(self, result):
-            if result.propagate_boolean():
-                return result.build_flags
-
-        def do_get_build_targets_async(self, cancellable, callback, data=None):
-            task = Gio.Task.new(self, cancellable, callback)
-            task.build_targets = []
-            # get the build targets
-            task.return_boolean(True)
-
-        def do_get_build_targets_finish(self, result):
-            if result.propagate_boolean():
-                return result.build_targets
+   from gi.repository import Gio, Ide
+
+   class BasicBuildSystem(Ide.Object, Ide.BuildSystem, Gio.AsyncInitable):
+
+       def do_init_async(self, priority, cancel, callback, data=None):
+           task = Gio.Task.new(self, cancel, callback)
+           task.set_priority(priority)
+           # do something, like check if a build file exists
+           task.return_boolean(True)
+
+       def do_init_finish(self, result):
+           return result.propagate_boolean()
+
+       def do_get_priority(self):
+           return 0 # Choose a priority based on other build systems' priority
+
+       def do_get_build_flags_async(self, ifile, cancellable, callback, data=None):
+           task = Gio.Task.new(self, cancellable, callback)
+           task.ifile = ifile
+           task.build_flags = []
+           # get the build flags
+           task.return_boolean(True)
+
+       def do_get_build_flags_finish(self, result):
+           if result.propagate_boolean():
+               return result.build_flags
+
+       def do_get_build_targets_async(self, cancellable, callback, data=None):
+           task = Gio.Task.new(self, cancellable, callback)
+           task.build_targets = []
+           # get the build targets
+           task.return_boolean(True)
+
+       def do_get_build_targets_finish(self, result):
+           if result.propagate_boolean():
+               return result.build_targets
 
 
 How does Builder know which build system to use for a project? Each has an associated "project file" 
(configure.ac for autotools) that has to exist in the source directory for the build system to be used. If a 
project has multiple project files, the priorities of each are used to decide which to use. You can see where 
the priority is defined in the code above. The project file is defined in the ``.plugin`` file with these 
lines (in the case of the make plugin):