DOC: fix see also sections for get/set q/s form

Got mixed up with the see alsos pointing back to themselves.

Author: matthew-brett

nibabel/nifti1.py

@@ -1646,7 +1646,8 @@ def get_qform(self, coded=False):
 
         See also
         --------
-        Nifti1Header.set_qform
+        set_qform
+        get_sform
         """
         return self._header.get_qform(coded)
 
@@ -1678,7 +1679,8 @@ def set_qform(self, affine, code=None, strip_shears=True, **kwargs):
 
         See also
         --------
-        Nifti1Header.set_qform
+        get_qform
+        set_sform
 
         Examples
         --------
@@ -1731,7 +1733,8 @@ def get_sform(self, coded=False):
 
         See also
         --------
-        Nifti1Header.get_sform
+        set_sform
+        get_qform
         """
         return self._header.get_sform(coded)
 
@@ -1759,7 +1762,8 @@ def set_sform(self, affine, code=None, **kwargs):
 
         See also
         --------
-        Nifti1Header.set_sform
+        get_sform
+        set_qform
 
         Examples
         --------