Code style refinements.

src/packages/array_basic.rs

@@ -745,7 +745,7 @@ mod array_functions {
             len as usize
         };
 
-        let mut drained = array.drain(..start).collect::<Array>();
+        let mut drained: Array = array.drain(..start).collect();
         drained.extend(array.drain(len..));
 
         drained

src/packages/string_more.rs

@@ -110,7 +110,7 @@ mod string_functions {
     pub fn index_of_char_starting_from(string: &str, character: char, start: INT) -> INT {
         let start = if start < 0 {
             if let Some(n) = start.checked_abs() {
-                let chars = string.chars().collect::<Vec<_>>();
+                let chars: Vec<_> = string.chars().collect();
                 let num_chars = chars.len();
                 if n as usize > num_chars {
                     0