Fix SF bug #642168, help() fails for some builtin topics

Fix pydoc when doing help for:  and, or, not, UNICODE.

Will backport.

Lib/pydoc.py

@@ -1414,7 +1414,7 @@ class Helper:
         'STRINGS': ('ref/strings', 'str UNICODE SEQUENCES STRINGMETHODS FORMATTING TYPES'),
         'STRINGMETHODS': ('lib/string-methods', 'STRINGS FORMATTING'),
         'FORMATTING': ('lib/typesseq-strings', 'OPERATORS'),
-        'UNICODE': ('ref/unicode', 'encodings unicode TYPES STRING'),
+        'UNICODE': ('ref/strings', 'encodings unicode TYPES STRING'),
         'NUMBERS': ('ref/numbers', 'INTEGER FLOAT COMPLEX TYPES'),
         'INTEGER': ('ref/integers', 'int range'),
         'FLOAT': ('ref/floating', 'float math'),
@@ -1474,7 +1474,7 @@ class Helper:
         'SHIFTING': ('ref/shifting', 'EXPRESSIONS'),
         'BITWISE': ('ref/bitwise', 'EXPRESSIONS'),
         'COMPARISON': ('ref/comparisons', 'EXPRESSIONS BASICMETHODS'),
-        'BOOLEAN': ('ref/lambda', 'EXPRESSIONS TRUTHVALUE'),
+        'BOOLEAN': ('ref/Booleans', 'EXPRESSIONS TRUTHVALUE'),
         'ASSERTION': 'assert',
         'ASSIGNMENT': ('ref/assignment', 'AUGMENTEDASSIGNMENT'),
         'AUGMENTEDASSIGNMENT': ('ref/augassign', 'NUMBERMETHODS'),