java text blocks: split text block; ensure no trailing spaces introduced (IDEA-217012)

GitOrigin-RevId: 500fdf647c90dd8877e39cdbef4e88d0b24806eb

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/advTextBlock/SplitTextBlock.after.java

@@ -0,0 +1,7 @@
+class MyTest {
+  String text = """
+                Lorem 
+                   ipsum""" <caret>+ " " + """
+                dolor sit amet
+                """;
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/advTextBlock/SplitTextBlock.java

@@ -0,0 +1,6 @@
+class MyTest {
+  String text = """
+                Lorem 
+                   ipsum<caret> dolor sit amet
+                """;
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/advTextBlock/SplitTextBlockOnWhitespace.after.java

@@ -0,0 +1,6 @@
+class MyTest {
+  String text = """
+                Lorem ipsum""" <caret>+ " " + """
+                dolor sit amet
+                """;
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/advTextBlock/SplitTextBlockOnWhitespace.java

@@ -0,0 +1,5 @@
+class MyTest {
+  String text = """
+                Lorem ipsum <caret>dolor sit amet
+                """;
+}