fixed typo in comment

internal/util/util.go

@@ -320,7 +320,7 @@ func RunePos(b []byte, i int) int {
 	return CharacterCount(b[:i])
 }
 
-// IndexAnyUnquoted returns the first position is s of a character from chars.
+// IndexAnyUnquoted returns the first position in s of a character from chars.
 // Escaped (with '\\') and quoted (with single or double quotes) characters
 // are ignored. Returns -1 if not successful
 func IndexAnyUnquoted(s, chars string) int {