[meld] Note that GtkSourceView 4 is not supported

[Kai Willadsen <kaiw src gnome org>]

commit ebd02a954127e349a935e5eed47145323e7faff8
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Wed Apr 3 19:08:31 2019 +1000

    Note that GtkSourceView 4 is not supported

 README.md | 2 +-
 bin/meld  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/README.md b/README.md
index 13632c2c..51ccd4a8 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,7 @@ And following packages with GObject introspection:
 * Pango
 * PangoCairo
 * GTK+ 3.20
-* GtkSourceView 3.20
+* GtkSourceView 3.20 (note that GtkSourceView 4 is not supported)
 
 
 Build requirements
diff --git a/bin/meld b/bin/meld
index 368961ee..80cea756 100755
--- a/bin/meld
+++ b/bin/meld
@@ -219,7 +219,7 @@ def check_requirements():
         assert hasattr(GtkSource, 'SearchSettings')
         assert hasattr(GtkSource, 'Tag')
     except (ImportError, AssertionError, ValueError) as e:
-        missing_reqs("GtkSourceView", gtksourceview_requirement, e)
+        missing_reqs("GtkSourceView 3", gtksourceview_requirement, e)
 
 
 def setup_resources():