diff --git a/Doc/library/binascii.rst b/Doc/library/binascii.rst
index c42f81f..2f7851a 100644
--- a/Doc/library/binascii.rst
+++ b/Doc/library/binascii.rst
@@ -109,11 +109,11 @@
    use as a checksum algorithm, it is not suitable for use as a general hash
    algorithm.  Use as follows::
 
-      print(binascii.crc32("hello world"))
+      print(binascii.crc32(b"hello world"))
       # Or, in two pieces:
-      crc = binascii.crc32("hello")
-      crc = binascii.crc32(" world", crc) & 0xffffffff
-      print('crc32 = 0x%08x' % crc)
+      crc = binascii.crc32(b"hello")
+      crc = binascii.crc32(b" world", crc) & 0xffffffff
+      print('crc32 = {:#010x}'.format(crc))
 
 .. note::
    To generate the same numeric value across all Python versions and
diff --git a/Doc/library/reprlib.rst b/Doc/library/reprlib.rst
index b529aca..056c5dc 100644
--- a/Doc/library/reprlib.rst
+++ b/Doc/library/reprlib.rst
@@ -129,5 +129,5 @@
                return repr(obj)
 
    aRepr = MyRepr()
-   print aRepr.repr(sys.stdin)          # prints '<stdin>'
+   print(aRepr.repr(sys.stdin))         # prints '<stdin>'
 
diff --git a/Doc/library/stdtypes.rst b/Doc/library/stdtypes.rst
index f43b71a..d2fb5f9 100644
--- a/Doc/library/stdtypes.rst
+++ b/Doc/library/stdtypes.rst
@@ -1907,7 +1907,7 @@
    .. describe:: iter(d)
 
       Return an iterator over the keys of the dictionary.  This is a shortcut
-      for :meth:`iterkeys`.
+      for ``iter(d.keys())``.
 
    .. method:: clear()