Fix the docstrings of the capitalize method.
diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index dba3d36..6270e9b 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -6705,7 +6705,7 @@
              "S.capitalize() -> str\n\
 \n\
 Return a capitalized version of S, i.e. make the first character\n\
-have upper case.");
+have upper case and the rest lower case.");
 
 static PyObject*
 unicode_capitalize(PyUnicodeObject *self)