Some far-reaching naming changes:
  * Command method 'find_peer()' -> 'get_finalized_command()'
  * Command method 'run_peer()' -> 'run_command()'
Also deleted the 'get_command_option()' method from Command, and
  fixed the one place where it was used (in "bdist_dumb").
diff --git a/Lib/distutils/command/sdist.py b/Lib/distutils/command/sdist.py
index 0a57ba3..6626b9e 100644
--- a/Lib/distutils/command/sdist.py
+++ b/Lib/distutils/command/sdist.py
@@ -223,15 +223,15 @@
                 self.files.extend (files)
 
         if self.distribution.has_pure_modules():
-            build_py = self.find_peer ('build_py')
+            build_py = self.get_finalized_command ('build_py')
             self.files.extend (build_py.get_source_files ())
 
         if self.distribution.has_ext_modules():
-            build_ext = self.find_peer ('build_ext')
+            build_ext = self.get_finalized_command ('build_ext')
             self.files.extend (build_ext.get_source_files ())
 
         if self.distribution.has_c_libraries():
-            build_clib = self.find_peer ('build_clib')
+            build_clib = self.get_finalized_command ('build_clib')
             self.files.extend (build_clib.get_source_files ())
 
 
@@ -441,7 +441,7 @@
         # while loop over lines of template file
 
         # Prune away the build and source distribution directories
-        build = self.find_peer ('build')
+        build = self.get_finalized_command ('build')
         exclude_pattern (self.files, None, prefix=build.build_base)
 
         base_dir = self.distribution.get_fullname()