feat(objectionary#117): allows same atoms with diff fqns

src/test/java/org/eolang/lints/errors/LtAtomIsNotUniqueTest.java

@@ -53,7 +53,7 @@ void catchesAtomDuplicatesWithoutPackages() throws Exception {
                     new MapEntry<>(
                         "bar",
                         new ParsedEo(
-                            "org/eolang/lints/errors/atom-is-not-unique/bar.eo"
+                            "org/eolang/lints/errors/atom-is-not-unique/bar-but-foo.eo"
                         ).value()
                     )
                 )
@@ -62,6 +62,30 @@ void catchesAtomDuplicatesWithoutPackages() throws Exception {
         );
     }
 
+    @Test
+    void allowsSameAtomsWithDifferentFqns() throws Exception {
+        MatcherAssert.assertThat(
+            "Defects are empty, but they should not",
+            new LtAtomIsNotUnique().defects(
+                new MapOf<String, XML>(
+                    new MapEntry<>(
+                        "foo",
+                        new ParsedEo(
+                            "org/eolang/lints/errors/atom-is-not-unique/foo.eo"
+                        ).value()
+                    ),
+                    new MapEntry<>(
+                        "bar",
+                        new ParsedEo(
+                            "org/eolang/lints/errors/atom-is-not-unique/bar.eo"
+                        ).value()
+                    )
+                )
+            ),
+            Matchers.emptyIterable()
+        );
+    }
+
     @Test
     void catchesAtomDuplicatesWithinSamePackage() throws Exception {
         MatcherAssert.assertThat(

src/test/resources/org/eolang/lints/errors/atom-is-not-unique/bar.eo

@@ -0,0 +1,25 @@
+# The MIT License (MIT)
+#
+# Copyright (c) 2016-2024 Objectionary.com
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included
+# in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+# Bar.
+[] > bar
+  [] > test /int