[pango/matthiasc/for-master: 202/202] Expand the PANGO_UNDERLINE_ERROR docs

[Matthias Clasen <matthiasc src gnome org>]

commit 0db2d63ba5a77eabb17f7fedceb48ef5a36c7805
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Apr 3 14:08:26 2021 -0400

    Expand the PANGO_UNDERLINE_ERROR docs
    
    Clarify that the exact style of rendering is up
    to the PangoRenderer in use.

 pango/pango-attributes.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/pango/pango-attributes.h b/pango/pango-attributes.h
index e20b6413..db8d8262 100644
--- a/pango/pango-attributes.h
+++ b/pango/pango-attributes.h
@@ -214,7 +214,10 @@ typedef enum
  *     single characters, such as for keyboard accelerators.
  *     %PANGO_UNDERLINE_SINGLE should be used for extended
  *     portions of text.
- * @PANGO_UNDERLINE_ERROR: a wavy underline should be drawn below.
+ * @PANGO_UNDERLINE_ERROR: an underline indicating an error should
+ *     be drawn below. The exact style of rendering is up to the
+ *     `PangoRenderer` in use, but typical styles include wavy
+ *     or dotted lines.
  *     This underline is typically used to indicate an error such
  *     as a possible mispelling; in some cases a contrasting color
  *     may automatically be used. This type of underlining is