DOC: fixes to contributing guide and changelog

CHANGELOG.rst

@@ -169,7 +169,7 @@ Added
 * Simple built-in :mod:`.deprecated` decorator.
 * New :mod:`fsl.data.utils` module, which currently contains one function
   :func:`.guessType`, which guesses the data type of a file/directory path.
-* New `.commonBase` function for finding the common prefix of a set of
+* New :func:`.commonBase` function for finding the common prefix of a set of
   file/directory paths.
 
 
@@ -209,7 +209,7 @@ Fixed
 ^^^^^
 
 
-* Fixed an issue with the `.dicom.loadSeries` using memory-mapping for
+* Fixed an issue with the :func:`.dicom.loadSeries` using memory-mapping for
   image files that would subsequently be deleted.
 * Fixed an issue in the :class:`.GiftiMesh` class, where
   ``numpy``/``nibabel`` was returning read-only index arrays.

doc/contributing.rst

@@ -34,7 +34,7 @@ the following labels (this convention has been inherited from `nibabel
 
   * *BF*  : bug fix
   * *RF*  : refactoring
-  * *NF*  : new feature
+  * *ENH*:  enhancement/new feature
   * *BW*  : addresses backward-compatibility
   * *OPT* : optimization
   * *BK*  : breaks something and/or tests fail
@@ -102,7 +102,7 @@ Unit and integration tests are currently run with ``py.test`` and
 ``coverage``.
 
 - Aim for 100% code coverage.
-- Tests must pass on python 2.7, 3.4, 3.5, and 3.6
+- Tests must pass on python 3.5, 3.6, and 3.7.
 
 
 Coding conventions