Fix dartanalyzer.bat so it works when there are spaces in the path to dart sdk.

sdk/bin/dartanalyzer.bat

 @echo off
 rem Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 rem for details. All rights reserved. Use of this source code is governed by a
 rem BSD-style license that can be found in the LICENSE file.
 
 set SCRIPT_DIR=%~dp0
 if %SCRIPT_DIR:~-1%==\ set SCRIPT_DIR=%SCRIPT_DIR:~0,-1%
 
 for %%I in ("%SCRIPT_DIR%\..") do set "DART_ANALYZER_HOME=%%~fI"
 if %DART_ANALYZER_HOME:~-1%==\ set DART_ANALYZER_HOME=%DART_ANALYZER_HOME:~0,-1%
@@ skipping 18 matching lines @@
     ) else (
       for /f %%j in ('call echo !DART_SDK_HOME!') do set DART_SDK_HOME=%%~dpj\dart-sdk
       if exist "!DART_SDK_HOME!" (
         set DART_SDK=--dart-sdk !DART_SDK_HOME!
       ) else (
         echo Couldn't find Dart SDK. Specify with --dart-sdk cmdline argument
       )
     )
   )
 )
-endlocal & set "DART_SDK=%DART_SDK%" & set "DART_SDK_HOME=%DART_SDK_HOME%"
+endlocal & set DART_SDK=%DART_SDK% & set DART_SDK_HOME=%DART_SDK_HOME%
 
 if exist "%DART_SDK_HOME%\util\dartanalyzer\dartanalyzer.jar" (
-  set DART_ANALYZER_LIBS="%DART_SDK_HOME%\util\dartanalyzer"
+  set DART_ANALYZER_LIBS=%DART_SDK_HOME%\util\dartanalyzer
 ) else if exist "%DART_ANALYZER_HOME%\util\dartanalyzer\dartanalyzer.jar" (
-  set DART_ANALYZER_LIBS="%DART_ANALYZER_HOME%\util\dartanalyzer"
+  set DART_ANALYZER_LIBS=%DART_ANALYZER_HOME%\util\dartanalyzer
 ) else (
   echo Configuration problem. Couldn't find dartanalyzer.jar.
   exit /b 1
 )
 
 setlocal EnableDelayedExpansion
 set EXTRA_JVMARGS=-Xss2M 
 if [%FOUND_BATCH%] == [1] (
   set EXTRA_JVMARGS=!EXTRA_JVMARGS! -client
 )
 endlocal & set "EXTRA_JVMARGS=%EXTRA_JVMARGS%"
 
 java %EXTRA_JVMARGS% %DART_JVMARGS% -ea -jar "%DART_ANALYZER_LIBS%\dartanalyzer.jar" %DART_SDK% %*