diff --git a/Doc/library/decimal.rst b/Doc/library/decimal.rst
index 7cd8952..6e45e84 100644
--- a/Doc/library/decimal.rst
+++ b/Doc/library/decimal.rst
@@ -108,7 +108,7 @@
 .. seealso::
 
    * IBM's General Decimal Arithmetic Specification, `The General Decimal Arithmetic
-     Specification <http://www2.hursley.ibm.com/decimal/decarith.html>`_.
+     Specification <http://speleotrove.com/decimal/>`_.
 
    * IEEE standard 854-1987, `Unofficial IEEE 854 Text
      <http://754r.ucbtest.org/standards/854.pdf>`_.
@@ -531,8 +531,11 @@
 
    .. method:: is_normal()
 
-      Return :const:`True` if the argument is a *normal* finite number.  Return
-      :const:`False` if the argument is zero, subnormal, infinite or a NaN.
+      Return :const:`True` if the argument is a *normal* finite non-zero
+      number with an adjusted exponent greater than or equal to *Emin*.
+      Return :const:`False` if the argument is zero, subnormal, infinite or a
+      NaN.  Note, the term *normal* is used here in a different sense with
+      the :meth:`normalize` method which is used to create canonical values.
 
       .. versionadded:: 2.6
 
@@ -560,7 +563,8 @@
    .. method:: is_subnormal()
 
       Return :const:`True` if the argument is subnormal, and :const:`False`
-      otherwise.
+      otherwise. A number is subnormal is if it is nonzero, finite, and has an
+      adjusted exponent less than *Emin*.
 
       .. versionadded:: 2.6
 
diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst
index d716e97..55f23b9 100644
--- a/Doc/library/functions.rst
+++ b/Doc/library/functions.rst
@@ -603,6 +603,14 @@
    its :meth:`next` method; if the value returned is equal to *sentinel*,
    :exc:`StopIteration` will be raised, otherwise the value will be returned.
 
+   One useful application of the second form of :func:`iter` is to read lines of
+   a file until a certain line is reached.  The following example reads a file
+   until ``"STOP"`` is reached: ::
+
+      with open("mydata.txt") as fp:
+          for line in iter(fp.readline, "STOP"):
+              process_line(line)
+
    .. versionadded:: 2.2
 
 
diff --git a/Doc/library/struct.rst b/Doc/library/struct.rst
index 63bf9b1..d29bd7b 100644
--- a/Doc/library/struct.rst
+++ b/Doc/library/struct.rst
@@ -50,7 +50,7 @@
 
 .. function:: unpack_from(fmt, buffer[,offset=0])
 
-   Unpack the *buffer* according to tthe given format. The result is a tuple even
+   Unpack the *buffer* according to the given format. The result is a tuple even
    if it contains exactly one item. The *buffer* must contain at least the amount
    of data required by the format (``len(buffer[offset:])`` must be at least
    ``calcsize(fmt)``).
diff --git a/Doc/library/symtable.rst b/Doc/library/symtable.rst
index 28306e6..9ea3f01 100644
--- a/Doc/library/symtable.rst
+++ b/Doc/library/symtable.rst
@@ -164,6 +164,12 @@
       If the name is used as the target of a function or class statement, this
       will be true.
 
+      For example::
+
+         >>> table = symtable.symtable("def some_func(): pass", "string", "exec")
+         >>> table.lookup("some_func").is_namespace()
+         True
+
       Note that a single name can be bound to multiple objects.  If the result
       is ``True``, the name may also be bound to other objects, like an int or
       list, that does not introduce a new namespace.
diff --git a/Doc/reference/datamodel.rst b/Doc/reference/datamodel.rst
index 7c52694..5d612b8 100644
--- a/Doc/reference/datamodel.rst
+++ b/Doc/reference/datamodel.rst
@@ -1347,6 +1347,9 @@
 
    Arguments to rich comparison methods are never coerced.
 
+   To automatically generate ordering operations from a single root operation,
+   see the `Total Ordering recipe in the ASPN cookbook
+   <http://code.activestate.com/recipes/576529/>`_\.
 
 .. method:: object.__cmp__(self, other)