attempt to appease vint 2

Author: glennj

exercises/practice/grains/.meta/example.vim

@@ -8,7 +8,7 @@ function! StringAdd(a, b) abort
   let carry = 0
 
   for i in range(len - 1, 0, -1)
-    let c = carry + a->strpart(i, 1)->str2nr() + b->strpart(i, 1)->str2nr()
+    let c = carry + (a->strpart(i, 1)->str2nr()) + (b->strpart(i, 1)->str2nr())
     let result = $"{c % 10}{result}"
     let carry = c / 10
   endfor