MRG: edits of PR #896

[matthew-brett]

Closes #896 by applying edits in discussion there.

[codecov]

Codecov Report

Merging #935 into master will increase coverage by 0.13%.
The diff coverage is 89.87%.

@@            Coverage Diff             @@
##           master     #935      +/-   ##
==========================================
+ Coverage   91.70%   91.84%   +0.13%     
==========================================
  Files          96       97       +1     
  Lines       12311    12423     +112     
  Branches     2173     2190      +17     
==========================================
+ Hits        11290    11410     +120     
+ Misses        684      678       -6     
+ Partials      337      335       -2     

Impacted Files	Coverage Δ
nibabel/nicom/ascconv.py	89.87% <89.87%> (ø)
nibabel/data.py	86.99% <0.00%> (ø)
nibabel/ecat.py	88.07% <0.00%> (ø)
nibabel/info.py	100.00% <0.00%> (ø)
nibabel/funcs.py	80.28% <0.00%> (ø)
nibabel/optpkg.py	97.05% <0.00%> (ø)
nibabel/parrec.py	92.50% <0.00%> (ø)
nibabel/affines.py	100.00% <0.00%> (ø)
nibabel/analyze.py	98.52% <0.00%> (ø)
nibabel/viewers.py	96.14% <0.00%> (ø)
... and 38 more

---

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[effigies]

Looks good. Thanks!