4.x - Add docs for the spacing feature.

[ndm2]

No description provided.

[codecov]

Codecov Report

Merging #365 (3b9da77) into bs5 (c6c8420) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##                bs5     #365   +/-   ##
=========================================
  Coverage     99.25%   99.25%           
  Complexity      365      365           
=========================================
  Files            21       21           
  Lines          1075     1075           
=========================================
  Hits           1067     1067           
  Misses            8        8           

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