README: fix incorrect description

In my point of view, file updates will commit to filesystem only when
sync or close. There is a extra word 'no' here.

Fixes: bdff4bc59e ("Updated DESIGN.md to reflect v2 changes")
Signed-off-by: liaoweixiong <liaoweixiong@allwinnertech.com>

README.md

@@ -110,7 +110,7 @@ directory functions, with the deviation that the allocation of filesystem
 structures must be provided by the user.
 
 All POSIX operations, such as remove and rename, are atomic, even in event
-of power-loss. Additionally, no file updates are not actually committed to
+of power-loss. Additionally, file updates are not actually committed to
 the filesystem until sync or close is called on the file.
 
 ## Other notes

lfs.c

@@ -466,15 +466,9 @@ static int lfs_alloc(lfs_t *lfs, lfs_block_t *block) {
             }
         }
 
-        // no free blocks in lookahead buffer, need to scan tree
-        LFS_DEBUG("Scanning for free blocks %"PRIx32"-%"PRIx32,
-                lfs->free.i + lfs->free.off,
-                (lfs->free.i + lfs->free.off + 8*lfs->cfg->lookahead_size)
-                    % lfs->cfg->block_count);
-
         // check if we have looked at all blocks since last ack
         if (lfs->free.ack == 0) {
-            LFS_ERROR("No more free space %"PRIx32,
+            LFS_ERROR("No more free space %"PRIu32,
                     lfs->free.i + lfs->free.off);
             return LFS_ERR_NOSPC;
         }