Remove trailing white spaces, change tab to spaces

[fingolfin]

• Remove trailing whitespace
• Convert tabs to spaces

[codecov]

Codecov Report

Attention: Patch coverage is 79.76012% with 405 lines in your changes missing coverage. Please review.

Project coverage is 84.65%. Comparing base (ae49605) to head (f8877ab).

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #37   +/-   ##
=======================================
  Coverage   84.65%   84.65%           
=======================================
  Files          31       31           
  Lines        4189     4189           
=======================================
  Hits         3546     3546           
  Misses        643      643           

Files	Coverage Δ
lib/fincheck.gd	100.00% <ø> (ø)
lib/graphs.gd	100.00% <ø> (ø)
lib/grobner.gd	100.00% <ø> (ø)
lib/kary-heap.gd	100.00% <100.00%> (ø)
lib/nmo/ncalgebra.gd	100.00% <100.00%> (ø)
lib/nmo/ncinterface.gd	100.00% <ø> (ø)
lib/nmo/ncordmachine.gd	100.00% <ø> (ø)
lib/nparith.gd	100.00% <ø> (ø)
lib/npformat.gd	100.00% <ø> (ø)
lib/printing.gd	100.00% <ø> (ø)
... and 18 more

[fingolfin]

@cdwensley these are systematic changes removing trailing whitespace and converting tabs to spaces.