Primary extension for image pairs is now hdr, rather than img. Other little

doc tweaks.

fsl/data/image.py

@@ -1284,8 +1284,8 @@ EXTENSION_DESCRIPTIONS = ['Compressed NIFTI images',
 """Descriptions for each of the extensions in :data:`ALLOWED_EXTENSIONS`. """
 
 
-FILE_GROUPS = [('.img',    '.hdr'),
-               ('.img.gz', '.hdr.gz')]
+FILE_GROUPS = [('.hdr',    '.img'),
+               ('.hdr.gz', '.img.gz')]
 """File suffix groups used by :func:`addExt` to resolve file path
 ambiguities - see :func:`fsl.utils.path.addExt`.
 """

fsl/utils/imcp.py

@@ -4,7 +4,7 @@
 #
 # Author: Paul McCarthy <pauldmccarthy@gmail.com>
 #
-"""
+"""This module contains functions for moving/copying NIFIT image files.
 
 .. autosummary::
    :nosignatures:

fsl/utils/path.py

@@ -253,7 +253,7 @@ def getFileGroup(path,
         [('.img',    '.hdr'),
          ('.img.gz', '.hdr.gz')]
 
-    If you specify``fileGroups=[('.img', '.hdr')]`` and ``prefix='file'``, and
+    If you specify ``fileGroups=[('.img', '.hdr')]`` and ``prefix='file'``, and
     both ``file.img`` and ``file.hdr`` exist, the :func:`addExt` function would
     return ``file.img`` (i.e. the file which matches the first extension in
     the group).