doc: replace @return by Return:

Sphinx expects Return: and not @return to indicate a return value.

find . -name '*.c' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;

find . -name '*.h' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
diff --git a/include/android_ab.h b/include/android_ab.h
index 0941eb6..3eb6112 100644
--- a/include/android_ab.h
+++ b/include/android_ab.h
@@ -28,7 +28,7 @@
  *
  * @param[in] dev_desc Place to store the device description pointer
  * @param[in] part_info Place to store the partition information
- * @return The slot number (>= 0) on success, or a negative on error
+ * Return: The slot number (>= 0) on success, or a negative on error
  */
 int ab_select_slot(struct blk_desc *dev_desc, struct disk_partition *part_info);