Fix copyright year.

highlighters/main/test-data/comment-leading.zsh

@@ -1,6 +1,6 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
-# Copyright (c) 2010-2011 zsh-syntax-highlighting contributors
+# Copyright (c) 2015 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted

highlighters/main/test-data/comment-off.zsh

@@ -1,6 +1,6 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
-# Copyright (c) 2010-2011 zsh-syntax-highlighting contributors
+# Copyright (c) 2015 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted

highlighters/main/test-data/comments.zsh

@@ -1,6 +1,6 @@
 #!/usr/bin/env zsh
 # -------------------------------------------------------------------------------------------------
-# Copyright (c) 2010-2011 zsh-syntax-highlighting contributors
+# Copyright (c) 2015 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted

highlighters/main/test-data/double-quoted2.zsh

@@ -1,5 +1,5 @@
 # -------------------------------------------------------------------------------------------------
-# Copyright (c) 2010-2011 zsh-syntax-highlighting contributors
+# Copyright (c) 2015 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted

highlighters/main/test-data/double-quoted3.zsh

@@ -1,5 +1,5 @@
 # -------------------------------------------------------------------------------------------------
-# Copyright (c) 2010-2011 zsh-syntax-highlighting contributors
+# Copyright (c) 2015 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted

highlighters/main/test-data/double-quoted4.zsh

@@ -1,5 +1,5 @@
 # -------------------------------------------------------------------------------------------------
-# Copyright (c) 2010-2011 zsh-syntax-highlighting contributors
+# Copyright (c) 2015 zsh-syntax-highlighting contributors
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification, are permitted