[pango/bilelmoussaoui/gi-annotations: 1/2] add missing since 1.50 annotations

[Bilal Elmoussaoui <bilelmoussaoui src gnome org>]

commit 28b4e1576c166bb74e41b8f312d8e152588c0212
Author: Bilal Elmoussaoui <bil elmoussaoui gmail com>
Date:   Fri Oct 29 07:55:03 2021 +0100

    add missing since 1.50 annotations

 pango/pango-attributes.c | 2 ++
 pango/pango-attributes.h | 7 +++++++
 pango/pango-layout.c     | 6 ++++++
 3 files changed, 15 insertions(+)
---
diff --git a/pango/pango-attributes.c b/pango/pango-attributes.c
index a87c661e..c929a3d5 100644
--- a/pango/pango-attributes.c
+++ b/pango/pango-attributes.c
@@ -1644,6 +1644,8 @@ pango_attribute_as_float (PangoAttribute *attr)
  *
  * Returns: (nullable) (transfer none): The attribute as `PangoAttrString`,
  *   or %NULL if it's not a string attribute
+ *
+ * Since: 1.50
  */
 PangoAttrString *
 pango_attribute_as_string (PangoAttribute *attr)
diff --git a/pango/pango-attributes.h b/pango/pango-attributes.h
index 59183a60..982987f8 100644
--- a/pango/pango-attributes.h
+++ b/pango/pango-attributes.h
@@ -247,6 +247,13 @@ typedef enum {
   PANGO_BASELINE_SHIFT_SUBSCRIPT,
 } PangoBaselineShift;
 
+/**
+ * PangoFontScale:
+ * @PANGO_FONT_SCALE_SUPERSCRIPT: 
+ * @PANGO_FONT_SCALE_SUBSCRIPT: 
+ *
+ * Since: 1.50
+ */
 typedef enum {
   PANGO_FONT_SCALE_NONE,
   PANGO_FONT_SCALE_SUPERSCRIPT,
diff --git a/pango/pango-layout.c b/pango/pango-layout.c
index 6e761f2c..f91b91d3 100644
--- a/pango/pango-layout.c
+++ b/pango/pango-layout.c
@@ -7509,6 +7509,12 @@ pango_layout_iter_get_baseline (PangoLayoutIter *iter)
   return iter->line_extents[iter->line_index].baseline;
 }
 
+/**
+ * pango_layout_iter_get_run_baseline
+ * @iter: a `PangoLayoutIter`
+ * 
+ * Since: 1.50
+ */
 int
 pango_layout_iter_get_run_baseline (PangoLayoutIter *iter)
 {