[dwrite] Cosmetic change (#963)

src/hb-directwrite.h

diff --git a/src/hb-directwrite.h b/src/hb-directwrite.h
index e743af2..9bfd1f7 100644
--- a/src/hb-directwrite.h
+++ b/src/hb-directwrite.h
@@ -30,8 +30,9 @@
 HB_BEGIN_DECLS
 
 HB_EXTERN hb_bool_t
-hb_directwrite_shape_experimental_width(hb_font_t *font, hb_buffer_t *buffer,
-  const hb_feature_t *features, unsigned int num_features, float width);
+hb_directwrite_shape_experimental_width (hb_font_t *font, hb_buffer_t *buffer,
+					 const hb_feature_t *features,
+					 unsigned int num_features, float width);
 
 HB_END_DECLS