While indexing and trimming a multiple, never put a space between the indexed tertiary and the SUB symbol.
Do not put spaces direcly within indexers and trimmers, unless for
indentation purposes. As an exception to this rule, you can put a
single space before the "at" operator @ if desired.
Examples:
{ No space between tertiary and '[' }
int i = a[i];
int i = a[10:20]
{ No direct spaces within trimmers and indexers, but before }
[]int a = b[2:5@10];
[]int c = d[10:20 @1];