fix column size bug -- add decimal number to div operation (+7 squash…

…ed commits) (kubernetes#8631)

Squashed commits:
[b645d8e] remove debug
[47ba8b9] test new column size
[2f12ba5] use float
[b16f50b] test division
[789e289] test ceil
[012f6ad] debug offset
[514b529] debug column size

layouts/partials/docs/browse.html

@@ -21,7 +21,7 @@ <h3><a href="{{ .RelPermalink }}">{{ .Params.bigheader | default .Title }}</a></
   <div class="pages">
   {{ $num_pages := len $pages }}
   {{ if gt $num_pages 0 }}
-  {{ $column_size :=  (div $num_pages 3) | math.Ceil | int | default 1 }}
+  {{ $column_size :=  (div $num_pages 3.0) | math.Ceil | int | default 1 }}
   {{  range $i, $e := $pages.ByWeight }}
     {{ $offset := mod $i $column_size |  add 1 }}
     {{ if eq $offset 1 }}