Update copyright notices' years

I used the Git history for years after 2019, and only included 2019 or
2018 if they were already there.  I also added copyright notices to all
code files that don't already have them.

15 files changed, 60 insertions, 12 deletions

diff --git a/src/test/java/sevenUnits/unit/UnitDatabaseTest.java b/src/test/java/sevenUnits/unit/UnitDatabaseTest.java
index e55d6af..56296b4 100644
--- a/src/test/java/sevenUnits/unit/UnitDatabaseTest.java
+++ b/src/test/java/sevenUnits/unit/UnitDatabaseTest.java
@@ -1,5 +1,5 @@
 /**
- * Copyright (C) 2019 Adrien Hopkins
+ * Copyright (C) 2019, 2021, 2022, 2024, 2025 Adrien Hopkins
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Affero General Public License as published by
diff --git a/src/test/java/sevenUnits/unit/UnitTest.java b/src/test/java/sevenUnits/unit/UnitTest.java
index f8d3040..4d9a103 100644
--- a/src/test/java/sevenUnits/unit/UnitTest.java
+++ b/src/test/java/sevenUnits/unit/UnitTest.java
@@ -1,5 +1,5 @@
 /**
- * Copyright (C) 2018 Adrien Hopkins
+ * Copyright (C) 2018, 2021, 2022, 2024, 2025 Adrien Hopkins
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Affero General Public License as published by
diff --git a/src/test/java/sevenUnits/unit/UnitValueTest.java b/src/test/java/sevenUnits/unit/UnitValueTest.java
index 69569ae..6b80986 100644
--- a/src/test/java/sevenUnits/unit/UnitValueTest.java
+++ b/src/test/java/sevenUnits/unit/UnitValueTest.java
@@ -1,3 +1,19 @@
+/**
+ * Copyright (C) 2021, 2025 Adrien Hopkins
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
 package sevenUnits.unit;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
diff --git a/src/test/java/sevenUnits/utils/ConditionalExistenceCollectionsTest.java b/src/test/java/sevenUnits/utils/ConditionalExistenceCollectionsTest.java
index 868385b..29675de 100644
--- a/src/test/java/sevenUnits/utils/ConditionalExistenceCollectionsTest.java
+++ b/src/test/java/sevenUnits/utils/ConditionalExistenceCollectionsTest.java
@@ -1,5 +1,5 @@
 /**
- * Copyright (C) 2019 Adrien Hopkins
+ * Copyright (C) 2019, 2021, 2022, 2024, 2025 Adrien Hopkins
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Affero General Public License as published by
diff --git a/src/test/java/sevenUnits/utils/ExpressionParserTest.java b/src/test/java/sevenUnits/utils/ExpressionParserTest.java
index 15701ce..463880b 100644
--- a/src/test/java/sevenUnits/utils/ExpressionParserTest.java
+++ b/src/test/java/sevenUnits/utils/ExpressionParserTest.java
@@ -1,5 +1,5 @@
 /**
- * Copyright (C) 2019 Adrien Hopkins
+ * Copyright (C) 2019, 2021, 2024, 2025 Adrien Hopkins
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Affero General Public License as published by
diff --git a/src/test/java/sevenUnits/utils/NameSymbolTest.java b/src/test/java/sevenUnits/utils/NameSymbolTest.java
index 327cd9f..55e09c4 100644
--- a/src/test/java/sevenUnits/utils/NameSymbolTest.java
+++ b/src/test/java/sevenUnits/utils/NameSymbolTest.java
@@ -1,3 +1,19 @@
+/**
+ * Copyright (C) 2025 Adrien Hopkins
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
 package sevenUnits.utils;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
diff --git a/src/test/java/sevenUnits/utils/ObjectProductTest.java b/src/test/java/sevenUnits/utils/ObjectProductTest.java
index 8c6b353..584b3f3 100644
--- a/src/test/java/sevenUnits/utils/ObjectProductTest.java
+++ b/src/test/java/sevenUnits/utils/ObjectProductTest.java
@@ -1,5 +1,5 @@
 /**
- * Copyright (C) 2018 Adrien Hopkins
+ * Copyright (C) 2018, 2021, 2024, 2025 Adrien Hopkins
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Affero General Public License as published by
diff --git a/src/test/java/sevenUnits/utils/SemanticVersionTest.java b/src/test/java/sevenUnits/utils/SemanticVersionTest.java
index 1e59ae3..295ad39 100644
--- a/src/test/java/sevenUnits/utils/SemanticVersionTest.java
+++ b/src/test/java/sevenUnits/utils/SemanticVersionTest.java
@@ -1,5 +1,5 @@
 /**
- * Copyright (C) 2022 Adrien Hopkins
+ * Copyright (C) 2022, 2024, 2025 Adrien Hopkins
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Affero General Public License as published by
diff --git a/src/test/java/sevenUnits/utils/UncertainDoubleTest.java b/src/test/java/sevenUnits/utils/UncertainDoubleTest.java
index b251b31..fe66e2d 100644
--- a/src/test/java/sevenUnits/utils/UncertainDoubleTest.java
+++ b/src/test/java/sevenUnits/utils/UncertainDoubleTest.java
@@ -1,5 +1,5 @@
 /**
- * Copyright (C) 2021 Adrien Hopkins
+ * Copyright (C) 2021, 2022, 2024, 2025 Adrien Hopkins
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Affero General Public License as published by
diff --git a/src/test/java/sevenUnitsGUI/I18nTest.java b/src/test/java/sevenUnitsGUI/I18nTest.java
index 73bd727..2875db6 100644
--- a/src/test/java/sevenUnitsGUI/I18nTest.java
+++ b/src/test/java/sevenUnitsGUI/I18nTest.java
@@ -1,3 +1,19 @@
+/**
+ * Copyright (C) 2025 Adrien Hopkins
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
 package sevenUnitsGUI;
 
 import static org.junit.jupiter.api.Assertions.assertNotNull;
diff --git a/src/test/java/sevenUnitsGUI/PrefixRepetitionTest.java b/src/test/java/sevenUnitsGUI/PrefixRepetitionTest.java
index 476e407..ce75cca 100644
--- a/src/test/java/sevenUnitsGUI/PrefixRepetitionTest.java
+++ b/src/test/java/sevenUnitsGUI/PrefixRepetitionTest.java
@@ -1,5 +1,5 @@
 /**
- * Copyright (C) 2022 Adrien Hopkins
+ * Copyright (C) 2022, 2024, 2025 Adrien Hopkins
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Affero General Public License as published by
diff --git a/src/test/java/sevenUnitsGUI/PrefixSearchTest.java b/src/test/java/sevenUnitsGUI/PrefixSearchTest.java
index 8790315..c7c652b 100644
--- a/src/test/java/sevenUnitsGUI/PrefixSearchTest.java
+++ b/src/test/java/sevenUnitsGUI/PrefixSearchTest.java
@@ -1,5 +1,5 @@
 /**
- * Copyright (C) 2022 Adrien Hopkins
+ * Copyright (C) 2022, 2024, 2025 Adrien Hopkins
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Affero General Public License as published by
diff --git a/src/test/java/sevenUnitsGUI/PresenterTest.java b/src/test/java/sevenUnitsGUI/PresenterTest.java
index 1d9b45b..20d0c8a 100644
--- a/src/test/java/sevenUnitsGUI/PresenterTest.java
+++ b/src/test/java/sevenUnitsGUI/PresenterTest.java
@@ -1,5 +1,5 @@
 /**
- * Copyright (C) 2022 Adrien Hopkins
+ * Copyright (C) 2022-2025 Adrien Hopkins
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Affero General Public License as published by
diff --git a/src/test/java/sevenUnitsGUI/RoundingTest.java b/src/test/java/sevenUnitsGUI/RoundingTest.java
index f749f85..535167c 100644
--- a/src/test/java/sevenUnitsGUI/RoundingTest.java
+++ b/src/test/java/sevenUnitsGUI/RoundingTest.java
@@ -1,5 +1,5 @@
 /**
- * Copyright (C) 2022 Adrien Hopkins
+ * Copyright (C) 2022, 2024, 2025 Adrien Hopkins
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Affero General Public License as published by
diff --git a/src/test/java/sevenUnitsGUI/TabbedViewTest.java b/src/test/java/sevenUnitsGUI/TabbedViewTest.java
index 017e9ea..7819452 100644
--- a/src/test/java/sevenUnitsGUI/TabbedViewTest.java
+++ b/src/test/java/sevenUnitsGUI/TabbedViewTest.java
@@ -1,5 +1,5 @@
 /**
- * Copyright (C) 2022 Adrien Hopkins
+ * Copyright (C) 2022, 2024, 2025 Adrien Hopkins
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Affero General Public License as published by