WS cleanup: remove trailing white space

Signed-off-by: Wolfgang Denk <wd@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/board/warp7/README b/board/warp7/README
index 579bb2d..05cdfd0 100644
--- a/board/warp7/README
+++ b/board/warp7/README
@@ -19,7 +19,7 @@
 
 This will generate the U-Boot binary called u-boot-dtb.imx.
 
-Put warp7 board in USB download mode: 
+Put warp7 board in USB download mode:
 
 Remove the CPU board from the base board then put switch 2 in the upper
 position