[gtksourceview] SpaceDrawer: replace comment by self-documented code

[Sébastien Wilmet <swilmet src gnome org>]

commit c6bad6e2265209a9e9dd1b4f73995f39df43bbe0
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Sat Jul 23 09:00:26 2016 +0200

    SpaceDrawer: replace comment by self-documented code

 gtksourceview/gtksourcespacedrawer.c |    9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)
---
diff --git a/gtksourceview/gtksourcespacedrawer.c b/gtksourceview/gtksourcespacedrawer.c
index 3adc458..fc0edbc 100644
--- a/gtksourceview/gtksourcespacedrawer.c
+++ b/gtksourceview/gtksourcespacedrawer.c
@@ -183,6 +183,12 @@ is_nbsp (gunichar ch)
 }
 
 static inline gboolean
+is_narrowed_nbsp (gunichar ch)
+{
+       return ch == 0x202F;
+}
+
+static inline gboolean
 is_space (gunichar ch)
 {
        return g_unichar_type (ch) == G_UNICODE_SPACE_SEPARATOR;
@@ -335,8 +341,7 @@ draw_whitespace_at_iter (GtkTextView *text_view,
        }
        else if (is_nbsp (ch))
        {
-               /* We also need to check if we want to draw a narrowed space */
-               draw_nbsp_at_pos (cr, rect, ch == 0x202F);
+               draw_nbsp_at_pos (cr, rect, is_narrowed_nbsp (ch));
        }
        else if (is_space (ch))
        {