doc: update copyrights for 2020

Using the 'update-copyright' script from gnulib[1]:

git ls-files | UPDATE_COPYRIGHT_HOLDER='all contributors' \
  UPDATE_COPYRIGHT_USE_INTERVALS=2 \
  xargs /path/to/gnulib/build-aux/update-copyright

[1] https://git.savannah.gnu.org/git/gnulib.git

15 files changed, 15 insertions, 15 deletions

diff --git a/bin/dtas-archive b/bin/dtas-archive
index f47f05a..dd3b537 100755
--- a/bin/dtas-archive
+++ b/bin/dtas-archive
@@ -1,5 +1,5 @@
 #!/usr/bin/env ruby
-# Copyright (C) 2015-2016 all contributors <dtas-all@nongnu.org>
+# Copyright (C) 2015-2020 all contributors <dtas-all@nongnu.org>
 # License: GPL-3.0+ <https://www.gnu.org/licenses/gpl-3.0.txt>
 # frozen_string_literal: true
 usage = "#$0 SOURCE DESTINATION"
diff --git a/bin/dtas-console b/bin/dtas-console
index 2143e65..d7e1a23 100755
--- a/bin/dtas-console
+++ b/bin/dtas-console
@@ -1,5 +1,5 @@
 #!/usr/bin/env ruby
-# Copyright (C) 2013-2019 all contributors <dtas-all@nongnu.org>
+# Copyright (C) 2013-2020 all contributors <dtas-all@nongnu.org>
 # License: GPL-3.0+ <https://www.gnu.org/licenses/gpl-3.0.txt>
 # frozen_string_literal: true
 #
diff --git a/bin/dtas-ctl b/bin/dtas-ctl
index 171576f..2d55e16 100755
--- a/bin/dtas-ctl
+++ b/bin/dtas-ctl
@@ -1,5 +1,5 @@
 #!/usr/bin/env ruby
-# Copyright (C) 2013-2016 all contributors <dtas-all@nongnu.org>
+# Copyright (C) 2013-2020 all contributors <dtas-all@nongnu.org>
 # License: GPL-3.0+ <https://www.gnu.org/licenses/gpl-3.0.txt>
 # frozen_string_literal: true
 require 'dtas/unix_client'
diff --git a/bin/dtas-cueedit b/bin/dtas-cueedit
index 127b1a0..e176271 100755
--- a/bin/dtas-cueedit
+++ b/bin/dtas-cueedit
@@ -1,5 +1,5 @@
 #!/usr/bin/env ruby
-# Copyright (C) 2013-2016 all contributors <dtas-all@nongnu.org>
+# Copyright (C) 2013-2020 all contributors <dtas-all@nongnu.org>
 # License: GPL-3.0+ <https://www.gnu.org/licenses/gpl-3.0.txt>
 # frozen_string_literal: true
 require 'tempfile'
diff --git a/bin/dtas-enq b/bin/dtas-enq
index f054687..f49d3f7 100755
--- a/bin/dtas-enq
+++ b/bin/dtas-enq
@@ -1,5 +1,5 @@
 #!/usr/bin/env ruby
-# Copyright (C) 2013-2016 all contributors <dtas-all@nongnu.org>
+# Copyright (C) 2013-2020 all contributors <dtas-all@nongnu.org>
 # License: GPL-3.0+ <https://www.gnu.org/licenses/gpl-3.0.txt>
 # frozen_string_literal: true
 require 'dtas/unix_client'
diff --git a/bin/dtas-mlib b/bin/dtas-mlib
index 45c3d01..7a07794 100755
--- a/bin/dtas-mlib
+++ b/bin/dtas-mlib
@@ -1,5 +1,5 @@
 #!/usr/bin/env ruby
-# Copyright (C) 2015-2016 all contributors <dtas-all@nongnu.org>
+# Copyright (C) 2015-2020 all contributors <dtas-all@nongnu.org>
 # License: GPL-3.0+ <https://www.gnu.org/licenses/gpl-3.0.txt>
 # frozen_string_literal: true
 usage = "#$0 [-d DATABASE-URI] ACTION [ARGS]"
diff --git a/bin/dtas-msinkctl b/bin/dtas-msinkctl
index 9abf2dc..189738f 100755
--- a/bin/dtas-msinkctl
+++ b/bin/dtas-msinkctl
@@ -1,5 +1,5 @@
 #!/usr/bin/env ruby
-# Copyright (C) 2013-2016 all contributors <dtas-all@nongnu.org>
+# Copyright (C) 2013-2020 all contributors <dtas-all@nongnu.org>
 # License: GPL-3.0+ <https://www.gnu.org/licenses/gpl-3.0.txt>
 # frozen_string_literal: true
 require 'yaml'
diff --git a/bin/dtas-partstats b/bin/dtas-partstats
index 388f7ba..884a6d1 100755
--- a/bin/dtas-partstats
+++ b/bin/dtas-partstats
@@ -1,5 +1,5 @@
 #!/usr/bin/env ruby
-# Copyright (C) 2013-2016 all contributors <dtas-all@nongnu.org>
+# Copyright (C) 2013-2020 all contributors <dtas-all@nongnu.org>
 # License: GPL-3.0+ <https://www.gnu.org/licenses/gpl-3.0.txt>
 # frozen_string_literal: true
 # TODO
diff --git a/bin/dtas-player b/bin/dtas-player
index ccb3969..21bc45f 100755
--- a/bin/dtas-player
+++ b/bin/dtas-player
@@ -1,5 +1,5 @@
 #!/usr/bin/env ruby
-# Copyright (C) 2013-2016 all contributors <dtas-all@nongnu.org>
+# Copyright (C) 2013-2020 all contributors <dtas-all@nongnu.org>
 # License: GPL-3.0+ <https://www.gnu.org/licenses/gpl-3.0.txt>
 # frozen_string_literal: true
 Thread.abort_on_exception = $stderr.sync = $stdout.sync = true
diff --git a/bin/dtas-readahead b/bin/dtas-readahead
index 99ba65c..3eedd86 100755
--- a/bin/dtas-readahead
+++ b/bin/dtas-readahead
@@ -1,5 +1,5 @@
 #!/usr/bin/env ruby
-# Copyright (C) 2015-2019 all contributors <dtas-all@nongnu.org>
+# Copyright (C) 2015-2020 all contributors <dtas-all@nongnu.org>
 # License: GPL-3.0+ <https://www.gnu.org/licenses/gpl-3.0.txt>
 # frozen_string_literal: true
 #
diff --git a/bin/dtas-sinkedit b/bin/dtas-sinkedit
index 61bb959..3393aac 100755
--- a/bin/dtas-sinkedit
+++ b/bin/dtas-sinkedit
@@ -1,5 +1,5 @@
 #!/usr/bin/env ruby
-# Copyright (C) 2013-2016 all contributors <dtas-all@nongnu.org>
+# Copyright (C) 2013-2020 all contributors <dtas-all@nongnu.org>
 # License: GPL-3.0+ <https://www.gnu.org/licenses/gpl-3.0.txt>
 # frozen_string_literal: true
 require 'optparse'
diff --git a/bin/dtas-sourceedit b/bin/dtas-sourceedit
index 713c466..23362c2 100755
--- a/bin/dtas-sourceedit
+++ b/bin/dtas-sourceedit
@@ -1,5 +1,5 @@
 #!/usr/bin/env ruby
-# Copyright (C) 2013-2016 all contributors <dtas-all@nongnu.org>
+# Copyright (C) 2013-2020 all contributors <dtas-all@nongnu.org>
 # License: GPL-3.0+ <https://www.gnu.org/licenses/gpl-3.0.txt>
 # frozen_string_literal: true
 require 'optparse'
diff --git a/bin/dtas-splitfx b/bin/dtas-splitfx
index 839d273..d041679 100755
--- a/bin/dtas-splitfx
+++ b/bin/dtas-splitfx
@@ -1,5 +1,5 @@
 #!/usr/bin/env ruby
-# Copyright (C) 2013-2016 all contributors <dtas-all@nongnu.org>
+# Copyright (C) 2013-2020 all contributors <dtas-all@nongnu.org>
 # License: GPL-3.0+ <https://www.gnu.org/licenses/gpl-3.0.txt>
 # frozen_string_literal: true
 require 'yaml'
diff --git a/bin/dtas-tl b/bin/dtas-tl
index 1ce18de..988e726 100755
--- a/bin/dtas-tl
+++ b/bin/dtas-tl
@@ -1,5 +1,5 @@
 #!/usr/bin/env ruby
-# Copyright (C) 2013-2016 all contributors <dtas-all@nongnu.org>
+# Copyright (C) 2013-2020 all contributors <dtas-all@nongnu.org>
 # License: GPL-3.0+ <https://www.gnu.org/licenses/gpl-3.0.txt>
 # frozen_string_literal: true
 # encoding: binary
diff --git a/bin/dtas-xdelay b/bin/dtas-xdelay
index 138f521..060752c 100755
--- a/bin/dtas-xdelay
+++ b/bin/dtas-xdelay
@@ -1,5 +1,5 @@
 #!/usr/bin/env ruby
-# Copyright (C) 2013-2016 all contributors <dtas-all@nongnu.org>
+# Copyright (C) 2013-2020 all contributors <dtas-all@nongnu.org>
 # License: GPL-3.0+ <https://www.gnu.org/licenses/gpl-3.0.txt>
 # frozen_string_literal: true
 USAGE = "Usage: #$0 [-x FREQ] [-l] /dev/fd/LO /dev/fd/HI DELAY [DELAY ...]"