[SPARK-6568] spark-shell.cmd --jars option does not accept the jar th…

…at has space in its path

escape spaces in the arguments.

core/src/main/scala/org/apache/spark/util/Utils.scala

@@ -1651,7 +1651,7 @@ private[spark] object Utils extends Logging {
   /**
    * Format a Windows path such that it can be safely passed to a URI.
    */
-  def formatWindowsPath(path: String): String = path.replace("\\", "/")
+  def formatWindowsPath(path: String): String = path.replace("\\", "/").replace(" ", "%20")
 
   /**
    * Indicates whether Spark is currently running unit tests.

core/src/test/scala/org/apache/spark/util/UtilsSuite.scala

@@ -241,6 +241,7 @@ class UtilsSuite extends FunSuite with ResetSystemProperties {
     assertResolves("C:/path/to/file.txt", "file:/C:/path/to/file.txt", testWindows = true)
     assertResolves("C:\\path\\to\\file.txt", "file:/C:/path/to/file.txt", testWindows = true)
     assertResolves("file:/C:/path/to/file.txt", "file:/C:/path/to/file.txt", testWindows = true)
+    assertResolves("file:/C:/path to/file.txt", "file:/C:/path%20to/file.txt", testWindows = true)
     assertResolves("file:///C:/path/to/file.txt", "file:/C:/path/to/file.txt", testWindows = true)
     assertResolves("file:/C:/file.txt#alias.txt", "file:/C:/file.txt#alias.txt", testWindows = true)
     intercept[IllegalArgumentException] { Utils.resolveURI("file:foo") }
@@ -264,8 +265,9 @@ class UtilsSuite extends FunSuite with ResetSystemProperties {
     assertResolves("hdfs:/jar1,file:/jar2,jar3", s"hdfs:/jar1,file:/jar2,file:$cwd/jar3")
     assertResolves("hdfs:/jar1,file:/jar2,jar3,jar4#jar5",
       s"hdfs:/jar1,file:/jar2,file:$cwd/jar3,file:$cwd/jar4#jar5")
-    assertResolves("hdfs:/jar1,file:/jar2,jar3,C:\\pi.py#py.pi",
-      s"hdfs:/jar1,file:/jar2,file:$cwd/jar3,file:/C:/pi.py#py.pi", testWindows = true)
+    assertResolves("""hdfs:/jar1,file:/jar2,jar3,C:\pi.py#py.pi,C:\path to\jar4.jar""",
+      s"hdfs:/jar1,file:/jar2,file:$cwd/jar3,file:/C:/pi.py#py.pi,file:/C:/path%20to/jar4.jar",
+      testWindows = true)
   }
 
   test("nonLocalPaths") {