Bustage fix from bug 769908 - remove trailing whitespace after a backslash

dom/indexedDB/ipc/Makefile.in

@@ -45,7 +45,7 @@ include $(topsrcdir)/config/rules.mk
 
 # Copy all the normal xpcshell tests from the regular unit directory.
 copy-xpcshell-tests:
-	$(call install_cmd,  $(wildcard $(topsrcdir)/dom/indexedDB/test/unit/test_*.js) \ 
+	$(call install_cmd,$(wildcard $(topsrcdir)/dom/indexedDB/test/unit/test_*.js) \
 		$(testxpcobjdir)/$(relativesrcdir)/$(XPCSHELL_TESTS))
 
 libs-xpcshell-tests: copy-xpcshell-tests