Fix a few docs blocks
diff --git a/src/hb-buffer.cc b/src/hb-buffer.cc
index 5c71734..c271086 100644
--- a/src/hb-buffer.cc
+++ b/src/hb-buffer.cc
@@ -37,6 +37,8 @@
 
 
 /**
+ * hb_segment_properties_equal:
+ *
  * Since: 0.9.7
  **/
 hb_bool_t
@@ -52,6 +54,8 @@
 }
 
 /**
+ * hb_segment_properties_hash:
+ *
  * Since: 0.9.7
  **/
 unsigned int
diff --git a/src/hb-glib.cc b/src/hb-glib.cc
index 7dbd83d..e203524 100644
--- a/src/hb-glib.cc
+++ b/src/hb-glib.cc
@@ -383,6 +383,8 @@
 }
 
 /**
+ * hb_glib_blob_create:
+ *
  * Since: 0.9.38
  **/
 hb_blob_t *
diff --git a/src/hb-ot-font.cc b/src/hb-ot-font.cc
index 8d33300..58586bf 100644
--- a/src/hb-ot-font.cc
+++ b/src/hb-ot-font.cc
@@ -370,6 +370,8 @@
 
 
 /**
+ * hb_ot_font_set_funcs:
+ *
  * Since: 0.9.28
  **/
 void
diff --git a/src/hb-ot-layout.cc b/src/hb-ot-layout.cc
index 3d4ee16..b0257f6 100644
--- a/src/hb-ot-layout.cc
+++ b/src/hb-ot-layout.cc
@@ -130,6 +130,8 @@
 }
 
 /**
+ * hb_ot_layout_get_glyph_class:
+ *
  * Since: 0.9.7
  **/
 hb_ot_layout_glyph_class_t
@@ -140,6 +142,8 @@
 }
 
 /**
+ * hb_ot_layout_get_glyphs_in_class:
+ *
  * Since: 0.9.7
  **/
 void
@@ -365,6 +369,8 @@
 }
 
 /**
+ * hb_ot_layout_language_get_required_feature:
+ *
  * Since: 0.9.30
  **/
 hb_bool_t
diff --git a/src/hb-ot-shape.cc b/src/hb-ot-shape.cc
index 7a93c62..1d9783e 100644
--- a/src/hb-ot-shape.cc
+++ b/src/hb-ot-shape.cc
@@ -855,6 +855,8 @@
 
 
 /**
+ * hb_ot_shape_plan_collect_lookups:
+ *
  * Since: 0.9.7
  **/
 void
@@ -888,6 +890,8 @@
 
 
 /**
+ * hb_ot_shape_glyphs_closure:
+ *
  * Since: 0.9.2
  **/
 void