# hello.nims
var str = " John"
system.insert(str, "Hello" , 0.Natural)
nim e hello.nims
hello.nims(3, 14) Error: type mismatch: got <string, string, Natural>
but expected one of:
proc insert[T](x: var seq[T]; item: T; i = 0.Natural)
first type mismatch at position: 1
required type: var seq[T]
but expression 'str' is of type: string
It seems that
proc insert(x: var string; item: string; i = 0.Natural)