Activate the viewcode extension in the automatically generated apidoc project.

sphinx/apidoc.py

@@ -301,6 +301,7 @@ Note: By default this script will not overwrite already created files.""")
             master = 'index',
             epub = True,
             ext_autodoc = True,
+            ext_viewcode = True,
             makefile = True,
             batchfile = True,
             mastertocmaxdepth = opts.maxdepth,

sphinx/pycode/__init__.py

@@ -217,6 +217,7 @@ class ModuleAnalyzer(object):
         pos = self.source.tell()
         if not decoded:
             self.encoding = detect_encoding(self.source.readline)
+            self.source.seek(pos)
             self.code = self.source.read().decode(self.encoding)
             self.source.seek(pos)
             self.source = TextIOWrapper(self.source, self.encoding)