Convert 'again' to 'loop'. Remove 'again' keyword

src/libcore/gc.rs

@@ -218,7 +218,7 @@ unsafe fn walk_gc_roots(mem: Memory, sentinel: **Word, visitor: Visitor) {
             last_ret = *ptr::offset(frame.fp, ret_offset) as *Word;
 
             if ptr::is_null(pc) {
-                again;
+                loop;
             }
 
             let mut delay_reached_sentinel = reached_sentinel;
@@ -231,13 +231,13 @@ unsafe fn walk_gc_roots(mem: Memory, sentinel: **Word, visitor: Visitor) {
                         if root == sentinel {
                             delay_reached_sentinel = true;
                         }
-                        again;
+                        loop;
                     }
 
                     // Skip null pointers, which can occur when a
                     // unique pointer has already been freed.
                     if ptr::is_null(*root) {
-                        again;
+                        loop;
                     }
 
                     if ptr::is_null(tydesc) {
@@ -324,7 +324,7 @@ fn cleanup_stack_for_failure() {
         for walk_gc_roots(need_cleanup, sentinel) |root, tydesc| {
             // Track roots to avoid double frees.
             if option::is_some(roots.find(&*root)) {
-                again;
+                loop;
             }
             roots.insert(*root, ());
 

src/libcore/io.rs

@@ -84,7 +84,7 @@ impl Reader {
                 assert (w > 0u);
                 if w == 1u {
                     vec::push(chars,  b0 as char );
-                    again;
+                    loop;
                 }
                 // can't satisfy this char with the existing data
                 if end > vec::len(buf) {

src/libcore/path.rs

@@ -419,10 +419,10 @@ pure fn normalize(components: &[~str]) -> ~[~str] {
     unchecked {
         for components.each |c| {
             unchecked {
-                if c == ~"." && components.len() > 1 { again; }
+                if c == ~"." && components.len() > 1 { loop; }
                 if c == ~".." && cs.len() != 0 {
                     vec::pop(cs);
-                    again;
+                    loop;
                 }
                 vec::push(cs, copy c);
             }