Don't support spaces in command, simplify msvs_emulation

test/win/gyptest-command-quote.py

Index: test/win/gyptest-command-quote.py
diff --git a/test/win/gyptest-command-quote.py b/test/win/gyptest-command-quote.py
index 7f873f2aad02a2e632fca11919da0ed7e292ab37..9303273aac908d62c276183fc7b29e928decc4ae 100644
--- a/test/win/gyptest-command-quote.py
+++ b/test/win/gyptest-command-quote.py
@@ -20,5 +20,12 @@ if sys.platform == 'win32':
   test = TestGyp.TestGyp(formats=['msvs', 'ninja'])
   CHDIR = 'command-quote'
   test.run_gyp('command-quote.gyp', chdir=CHDIR)
-  test.build('command-quote.gyp', test.ALL, chdir=CHDIR)
+
+  test.build('command-quote.gyp', 'test_batch', chdir=CHDIR)
+  test.build('command-quote.gyp', 'test_call_separate', chdir=CHDIR)
+
+  # We confirm that this fails because other generators don't handle spaces in
+  # inputs so it's preferable to not have it work here.
+  test.build('command-quote.gyp', 'test_with_spaces', chdir=CHDIR, status=1)
+
   test.pass_test()