Don't output trailing spaces in Printer

Also don't output trailing empty lines in TestGenerator

.idea/runConfigurations/Generate_Injectors.xml

@@ -10,7 +10,13 @@
     <option name="PASS_PARENT_ENVS" value="true" />
     <module name="generators" />
     <envs />
+    <RunnerSettings RunnerId="Debug">
+      <option name="DEBUG_PORT" value="" />
+      <option name="TRANSPORT" value="0" />
+      <option name="LOCAL" value="true" />
+    </RunnerSettings>
     <RunnerSettings RunnerId="Run" />
+    <ConfigurationWrapper RunnerId="Debug" />
     <ConfigurationWrapper RunnerId="Run" />
     <method />
   </configuration>

core/util.runtime/src/org/jetbrains/jet/utils/Printer.java

@@ -71,14 +71,18 @@ public class Printer {
         if (withholdIndentOnce) {
             withholdIndentOnce = false;
         }
-        else {
+        else if (objects.length > 0) {
-            append(indent);
+            printIndent();
         }
         printWithNoIndent(objects);
 
         return this;
     }
 
+    public void printIndent() {
+        append(indent);
+    }
+
     @NotNull
     public Printer printWithNoIndent(Object... objects) {
         for (Object object : objects) {

generators/src/org/jetbrains/jet/generators/tests/generator/TestGenerator.java

@@ -31,6 +31,7 @@ import java.io.File;
 import java.io.IOException;
 import java.util.Collection;
 import java.util.Collections;
+import java.util.Iterator;
 import java.util.Set;
 
 public class TestGenerator {
@@ -156,19 +157,24 @@ public class TestGenerator {
         p.pushIndent();
 
         Collection<TestMethodModel> testMethods = testClassModel.getTestMethods();
+        Collection<TestClassModel> innerTestClasses = testClassModel.getInnerTestClasses();
 
-        for (TestMethodModel testMethodModel : testMethods) {
+        for (Iterator<TestMethodModel> iterator = testMethods.iterator(); iterator.hasNext(); ) {
+            TestMethodModel testMethodModel = iterator.next();
             generateTestMethod(p, testMethodModel);
-            p.println();
+            if (iterator.hasNext() || !innerTestClasses.isEmpty()) {
+                p.println();
+            }
         }
 
-        Collection<TestClassModel> innerTestClasses = testClassModel.getInnerTestClasses();
+        for (Iterator<TestClassModel> iterator = innerTestClasses.iterator(); iterator.hasNext(); ) {
-        for (TestClassModel innerTestClass : innerTestClasses) {
+            TestClassModel innerTestClass = iterator.next();
-            if (innerTestClass.isEmpty()) {
+            if (!innerTestClass.isEmpty()) {
-                continue;
+                generateTestClass(p, innerTestClass, true);
+                if (iterator.hasNext()) {
+                    p.println();
+                }
             }
-            generateTestClass(p, innerTestClass, true);
-            p.println();
         }
 
         p.popIndent();

injector-generator/src/org/jetbrains/jet/di/DependencyInjectorGenerator.java

@@ -26,6 +26,7 @@ import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.jetbrains.jet.utils.Printer;
 
+import javax.annotation.PreDestroy;
 import java.io.File;
 import java.io.IOException;
 import java.lang.reflect.Method;
@@ -109,7 +110,7 @@ public class DependencyInjectorGenerator {
         p.println("}"); // class
 
         importManager.addClass(NotNull.class);
-        importManager.addClass(javax.annotation.PreDestroy.class);
+        importManager.addClass(PreDestroy.class);
         StringBuilder imports = new StringBuilder();
         generateImports(new Printer(imports), injectorPackageName);
 
@@ -128,7 +129,7 @@ public class DependencyInjectorGenerator {
         }
     }
 
-    private void generatePreamble(String injectorPackageName, Printer p) throws IOException {
+    private static void generatePreamble(String injectorPackageName, Printer p) throws IOException {
         String copyright = "injector-generator/copyright.txt";
         p.println(FileUtil.loadFile(new File(copyright)));
 
@@ -252,7 +253,7 @@ public class DependencyInjectorGenerator {
         p.pushIndent();
         for (Iterator<Parameter> iterator = parameters.iterator(); iterator.hasNext(); ) {
             Parameter parameter = iterator.next();
-            p.print(); // indent
+            p.printIndent();
             if (parameter.isRequired()) {
                 p.printWithNoIndent("@NotNull ");
             }