PEP 479: Fix formatting of examples.

pep-0479.txt

@@ -106,25 +106,33 @@ changed to simply return instead.  This will be compatible with all
 existing Python versions, and will not be affected by __future__.
 
 Lib/ipaddress.py::
+
     if other == self:
         raise StopIteration
+
 Becomes::
+
     if other == self:
         return
 
 In some cases, this can be combined with ``yield from`` to simplify
 the code, such as Lib/difflib.py::
+
     if context is None:
         while True:
             yield next(line_pair_iterator)
+
 Becomes::
+
     if context is None:
         yield from line_pair_iterator
         return
+
 (The ``return`` is necessary for a strictly-equivalent translation,
 though in this particular file, there is no further code, and the
 ``return`` can be elided.) For compatibility with pre-3.3 versions
 of Python, this could be written with an explicit ``for`` loop::
+
     if context is None:
         for line in line_pair_iterator:
             yield line
@@ -132,6 +140,7 @@ of Python, this could be written with an explicit ``for`` loop::
 
 More complicated iteration patterns will need explicit try/catch
 constructs.  For example, a parser construct like this::
+
     def unwrap(f):
         while True:
             data = next(f)
@@ -140,7 +149,9 @@ constructs.  For example, a parser construct like this::
                 if line == "- end -": break
                 data += line
             yield data
+
 would need to be rewritten as::
+
     def parser(f):
         while True:
             try:
@@ -152,7 +163,9 @@ would need to be rewritten as::
                 yield data
             except StopIteration:
                 return
+
 or possibly::
+
     def parser(f):
         for data in f:
             while True:
@@ -186,9 +199,11 @@ no value to return.  In this, it is similar to ``__getattr__`` (can
 raise ``AttributeError``), ``__getitem__`` (can raise ``KeyError``),
 and so on.  A helper function for an iterator can be written to
 follow the same protocol; for example::
+
     def helper(x, y):
         if x > y: return 1 / (x - y)
         raise StopIteration
+
     def __next__(self):
         if self.a: return helper(self.b, self.c)
         return helper(self.d, self.e)
@@ -201,8 +216,10 @@ A generator function is one which contains a ``yield`` expression.
 Each time it is (re)started, it may either yield a value, or return
 (including "falling off the end").  A helper function for a generator
 can also be written, but it must also follow generator protocol::
+
     def helper(x, y):
         if x > y: yield 1 / (x - y)
+
     def gen(self):
         if self.a: return (yield from helper(self.b, self.c))
         return (yield from helper(self.d, self.e))