rustfmt and trim trailing whitespace.

crates/misc/py/examples/gcd/gcd.rs

@@ -1,19 +1,17 @@
-
 #[inline(never)]
 #[no_mangle]
-pub extern fn gcd(m_: u32, n_: u32) -> u32
-{
-        let mut m = m_;
-        let mut n = n_;
-        while m > 0 {
-                let tmp = m;
-                m = n % m;
-                n = tmp;
-        }       
-        return n;
+pub extern "C" fn gcd(m_: u32, n_: u32) -> u32 {
+    let mut m = m_;
+    let mut n = n_;
+    while m > 0 {
+        let tmp = m;
+        m = n % m;
+        n = tmp;
+    }
+    return n;
 }
 
 #[no_mangle]
-pub extern fn test() -> u32 {
-  gcd(24, 9)
+pub extern "C" fn test() -> u32 {
+    gcd(24, 9)
 }