Codetf output for pom files now consider target lines instead of source (#454)

\close #work

Author: andrecsilva

plugins/codemodder-plugin-maven/src/main/java/io/codemodder/plugins/maven/DefaultArtifactInjectionPositionFinder.java

@@ -18,17 +18,17 @@ public int find(final List<AbstractDelta<String>> deltas, final String artifactI
       if (hasArtifactId && hasVersion) {
         // if it has the artifact and version, it could be the <dependencyManagement> section, which
         // is 2nd preference
-        backupPosition = 1 + delta.getSource().getPosition();
+        backupPosition = 1 + delta.getTarget().getPosition();
       } else if (hasArtifactId) {
         // if it has the artifact but not the version, it could be the <dependencies> section, which
         // is preferred
-        return 1 + delta.getSource().getPosition();
+        return 1 + delta.getTarget().getPosition();
       }
     }
     if (backupPosition != null) {
       return backupPosition;
     }
     // the fallback is to just use the first change to the file
-    return 1 + deltas.get(0).getSource().getPosition();
+    return 1 + deltas.get(0).getTarget().getPosition();
   }
 }

plugins/codemodder-plugin-maven/src/test/java/io/codemodder/plugins/maven/MavenProviderTest.java

@@ -172,11 +172,11 @@ private static Stream<Arguments> expectedChangeDescriptionLocations() {
         Arguments.of(simplePom, 7), // injects all new text in one delta
         Arguments.of(
             simplePomWithExistingSections,
-            16), // already has both sections, record at dependencies section
+            17), // already has both sections, record at dependencies section
         Arguments.of(
             webgoatPomThatJustNeedsUpgrades,
             151), // just updating the version number here in the properties
-        Arguments.of(webgoatPom, 413) // add to the end of the dependencies section
+        Arguments.of(webgoatPom, 419) // add to the end of the dependencies section
         );
   }