IDEA-CR-40089: Fixed bug with possible several internal dots

plugins/yaml/src/org/jetbrains/yaml/formatter/YAMLCopyPasteProcessor.java

@@ -25,7 +25,7 @@ import java.util.Iterator;
 import java.util.List;
 
 public class YAMLCopyPasteProcessor implements CopyPastePreProcessor {
-  private final static String CONFIG_KEY_SEQUENCE_PATTERN = "([^\\s{}\\[\\]][^\\s]*\\.)+[^\\s{}\\[\\].][^\\s.]*:?\\s*";
+  private final static String CONFIG_KEY_SEQUENCE_PATTERN = "([^\\s{}\\[\\].][^\\s.]*\\.)+[^\\s{}\\[\\].][^\\s.]*:?\\s*";
 
   @Nullable
   @Override

plugins/yaml/testSrc/org/jetbrains/yaml/paste/YAMLKeyPasteTest.java

@@ -78,6 +78,11 @@ public class YAMLKeyPasteTest extends LightPlatformCodeInsightFixtureTestCase {
     doTest("some. strange. text");
   }
 
+  // Ambiguity in dot splitting
+  public void testDoNotPasteKeysWithBadPattern3() {
+    doTest("some.strange..text");
+  }
+
   public void testDoNotPasteArrayAsKeys() {
     doTest("[x.y]");
   }

plugins/yaml/testSrc/org/jetbrains/yaml/paste/data/doNotPasteKeysWithBadPattern3.after.yml

@@ -0,0 +1,4 @@
+top:
+  next: value1
+  key:
+    some.strange..text<caret>

plugins/yaml/testSrc/org/jetbrains/yaml/paste/data/doNotPasteKeysWithBadPattern3.before.yml

@@ -0,0 +1,4 @@
+top:
+  next: value1
+  key:
+    <caret>