Add a test showing a weird quoting problem (#699)

test/blackbox-tests/jbuild

@@ -469,3 +469,14 @@
     (progn
      (run ${exe:cram.exe} run.t)
      (diff? run.t run.t.corrected))))))
+
+(alias
+ ((name runtest)
+  (deps ((package jbuilder)
+         (files_recursively_in test-cases/quoting)))
+  (action
+   (chdir test-cases/quoting
+    (progn
+     (run ${exe:cram.exe} run.t)
+     (diff? run.t run.t.corrected))))))
+

test/blackbox-tests/test-cases/quoting/jbuild

@@ -0,0 +1,3 @@
+(rule
+ ((targets (x y))
+  (action (with-stdout-to ${@} (echo foo)))))

test/blackbox-tests/test-cases/quoting/run.t

@@ -0,0 +1,9 @@
+This behavior is surprising, we should get an error about the fact
+that ${@} is not quoted and doesn't contain exactly 1 element
+
+  $ jbuilder build x
+  Error: Rule failed to generate the following targets:
+  - x
+  - y
+  [1]
+