bpo-38409: Fix grammar in str.strip() docstring (GH-16682)

diff --git a/Objects/clinic/unicodeobject.c.h b/Objects/clinic/unicodeobject.c.h
index c7d6edb..0d13406 100644
--- a/Objects/clinic/unicodeobject.c.h
+++ b/Objects/clinic/unicodeobject.c.h
@@ -582,7 +582,7 @@
 "strip($self, chars=None, /)\n"
 "--\n"
 "\n"
-"Return a copy of the string with leading and trailing whitespace remove.\n"
+"Return a copy of the string with leading and trailing whitespace removed.\n"
 "\n"
 "If chars is given and not None, remove characters in chars instead.");
 
@@ -1232,4 +1232,4 @@
 {
     return unicode_sizeof_impl(self);
 }
-/*[clinic end generated code: output=5e15747f78f18329 input=a9049054013a1b77]*/
+/*[clinic end generated code: output=e4ed33400979c7e8 input=a9049054013a1b77]*/