Fix http://code.google.com/p/processing/issues/detail?id=462

app/src/processing/app/format/AutoFormat.java

@@ -217,6 +217,20 @@ public class AutoFormat {
     return lastNonWhitespace;
   }
 
+  private void advanceToNonSpace() {
+    if (EOF) {
+      return;
+    }
+    do {
+      pos++;
+    } while (pos < chars.length && chars[pos] == ' ');
+    if (pos == chars.length - 1) {
+      EOF = true;
+    } else {
+      pos--; // reset for next()
+    }
+  }
+
   private char next() {
     if (EOF) {
       return 0;
@@ -328,6 +342,7 @@ public class AutoFormat {
         trimRight(buf);
         buf.append(c);
         buf.append(' ');
+        advanceToNonSpace();
         break;
 
       case ' ':

app/test/src/test/processing/parsing/AutoFormatTests.java

@@ -5,6 +5,7 @@ import static org.junit.Assert.fail;
 import static test.processing.parsing.ProcessingTestUtil.res;
 import java.io.File;
 import java.io.FileWriter;
+import java.io.IOException;
 import org.junit.BeforeClass;
 import org.junit.Test;
 
@@ -17,18 +18,11 @@ public class AutoFormatTests {
 
   static void expectGood(final String id) {
     try {
-      final String program = ProcessingTestUtil.format(res(id + ".pde"));
-      final File expectedFile = res(id + ".expected");
-      if (expectedFile.exists()) {
-        final String expected = ProcessingTestUtil.read(expectedFile);
-        assertEquals(expected, program);
-      } else {
-        System.err.println("WARN: " + id
-            + " does not have an expected output file. Generating.");
-        final FileWriter sug = new FileWriter(res(id + ".expected"));
-        sug.write(ProcessingTestUtil.normalize(program));
-        sug.close();
-      }
+      final String formattedProgram = ProcessingTestUtil.format(res(id + ".pde"));
+      final File goldenFile = res(id + ".expected");
+      checkGolden(formattedProgram, goldenFile);
+      // check that the formatted text doesn't change
+      checkGolden(ProcessingTestUtil.format(formattedProgram), goldenFile);
     } catch (Exception e) {
       if (!e.equals(e.getCause()) && e.getCause() != null)
         fail(e.getCause().toString());
@@ -38,11 +32,25 @@ public class AutoFormatTests {
     }
   }
 
+  private static void checkGolden(final String expectedText,
+                                  final File goldenFile) throws IOException {
+    if (goldenFile.exists()) {
+      final String expected = ProcessingTestUtil.read(goldenFile);
+      assertEquals(expected, expectedText);
+    } else {
+      System.err.println("WARN: golden file " + goldenFile
+          + " does not exist. Generating.");
+      final FileWriter sug = new FileWriter(goldenFile);
+      sug.write(ProcessingTestUtil.normalize(expectedText));
+      sug.close();
+    }
+  }
+
   @Test
   public void bug109() {
     expectGood("bug109");
   }
-  
+
   @Test
   public void bug420() {
     expectGood("bug420");

app/test/src/test/processing/parsing/ProcessingTestUtil.java

@@ -45,7 +45,11 @@ public class ProcessingTestUtil {
   
   static String format(final File resource)
   {
-    return normalize(new AutoFormat().format(read(resource)));
+    return format(read(resource));
+  }
+
+  static String format(final String programText) {
+    return normalize(new AutoFormat().format(programText));
   }
 
   static File res(final String resourceName) {