Revert Unicode UCD 5.2 upgrade in 3.x. It broke repr() for unicode objects,...

Revert Unicode UCD 5.2 upgrade in 3.x.  It broke repr() for unicode objects, and gave failures in test_bigmem.  Revert 79062, 79065 and 79083.

Lib/test/test_unicodedata.py

@@ -21,7 +21,7 @@ errors = 'surrogatepass'
 class UnicodeMethodsTest(unittest.TestCase):
 
     # update this, if the database changes
-    expectedchecksum = '4504dffd035baea02c5b9de82bebc3d65e0e0baf'
+    expectedchecksum = '0b915116051f3ed029a98542c2b7df63c9646272'
 
     def test_method_checksum(self):
         h = hashlib.sha1()
@@ -80,7 +80,7 @@ class UnicodeDatabaseTest(unittest.TestCase):
 class UnicodeFunctionsTest(UnicodeDatabaseTest):
 
     # update this, if the database changes
-    expectedchecksum = '6ccf1b1a36460d2694f9b0b0f0324942fe70ede6'
+    expectedchecksum = 'd4169ccff998ebbd1ec007a0b3fbd66e5ccf0229'
 
     def test_function_checksum(self):
         data = []

Misc/NEWS

@@ -290,8 +290,6 @@ Library
 - ``tokenize.detect_encoding`` now returns ``'utf-8-sig'`` when a UTF-8 BOM is
   detected.
 
-- Issue #8024: Update the Unicode database to 5.2.
-
 - Issue #6716/2: Backslash-replace error output in compilall.
 
 - Issue #4961: Inconsistent/wrong result of askyesno function in tkMessageBox

Tools/unicode/makeunicodedata.py

@@ -31,7 +31,7 @@ SCRIPT = sys.argv[0]
 VERSION = "2.6"
 
 # The Unicode Database
-UNIDATA_VERSION = "5.2.0"
+UNIDATA_VERSION = "5.1.0"
 UNICODE_DATA = "UnicodeData%s.txt"
 COMPOSITION_EXCLUSIONS = "CompositionExclusions%s.txt"
 EASTASIAN_WIDTH = "EastAsianWidth%s.txt"