whatsnew: consistently use 3 blanks between major sections. 2 for minor.

Doc/whatsnew/3.4.rst

@@ -78,6 +78,7 @@ For full details, see the
    :pep:`429` -- Python 3.4 Release Schedule
 
 
+
 Summary -- Release Highlights
 =============================
 
@@ -149,6 +150,7 @@ other smaller improvements, CPython optimizations, deprecations, and potential
 porting issues.
 
 
+
 New Expected Features for Python Implementations
 ================================================
 
@@ -341,6 +343,7 @@ Some smaller changes made to the core Python language are:
   :issue:`12892`.
 
 
+
 New Modules
 ===========
 
@@ -469,6 +472,7 @@ trace memory blocks allocated by Python. It provides the following information:
       PEP written and implemented by Victor Stinner
 
 
+
 Improved Modules
 ================
 
@@ -486,7 +490,6 @@ Using ``ABC`` as a base class has essentially the same effect as specifying
 (Contributed by Bruno Dupuis in :issue:`16049`.)
 
 
-
 aifc
 ----
 
@@ -1078,6 +1081,7 @@ Add a filter function to ignore some packages (tests for instance),
 (Contributed by Christian Tismer in :issue:`19274`.)
 
 
+
 CPython Implementation Changes
 ==============================
 
@@ -1176,6 +1180,7 @@ Other Build and C API Changes
   interpreter is not available (for example, in cross compilation scenarios).
 
 
+
 Other Improvements
 ==================
 
@@ -1204,6 +1209,7 @@ Other Improvements
   :issue:`13390`).
 
 
+
 Significant Optimizations
 =========================
 
@@ -1236,6 +1242,7 @@ Significant Optimizations
   common use case).  (Contributed by Serhiy Storchaka in :issue:`16674`).
 
 
+
 Deprecated
 ==========
 
@@ -1333,6 +1340,7 @@ removed:
   ``is_unverifiable`` have been removed (use direct attribute access instead).
 
 
+
 Porting to Python 3.4
 =====================