[gnome-builder] copyright: ignore when current year is found

[Christian Hergert <chergert src gnome org>]

commit d251f1dceb696b3eaefe38fa87200755475fae77
Author: Christian Hergert <chergert redhat com>
Date:   Tue Jan 28 11:48:15 2020 -0800

    copyright: ignore when current year is found

 src/plugins/copyright/copyright_plugin.py | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/src/plugins/copyright/copyright_plugin.py b/src/plugins/copyright/copyright_plugin.py
index 387ec09e9..0d7578660 100644
--- a/src/plugins/copyright/copyright_plugin.py
+++ b/src/plugins/copyright/copyright_plugin.py
@@ -78,6 +78,10 @@ class CopyrightBufferAddin(Ide.Object, Ide.BufferAddin):
             # Split based on 4-digit years
             parts = _YEAR_REGEX.split(text)
 
+            # Ignore if this year is already represented
+            if year in parts:
+                break
+
             # If we have at least 2 years, we can update them
             if len(parts) >= 2:
                 if '-' in parts: