Count all multiplies for given indent, fixes #592

Author: sheerun

ftdetect/polyglot.vim

@@ -2643,10 +2643,20 @@ if !has_key(s:disabled_packages, 'autoindent')
   func! s:get_shiftwidth(indents) abort
     let shiftwidth = 0
     let max_count = 0
+    let final_counts = {}
     for [indent, indent_count] in items(a:indents)
-      if indent_count > max_count
+      let indent_count *= 1.5
+      for [indent2, indent2_count] in items(a:indents)
+        if indent2 > indent && indent2 % indent == 0
+          let indent_count += indent2_count
+        endif
+      endfor
+      let final_counts[indent] = indent_count
+    endfor
+    for [indent, final_count] in items(final_counts)
+      if final_count > max_count
         let shiftwidth = indent
-        let max_count = indent_count
+        let max_count = final_count
       endif
     endfor
     return shiftwidth