[PATCH] stubdom: Use matching quotes in error message

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

This prevents syntax highlighting from believing the rest of the file is a
string.

Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
CC: George Dunlap <George.Dunlap@xxxxxxxxxxxxx>
CC: Ian Jackson <ian.jackson@xxxxxxxxxx>
CC: Jan Beulich <JBeulich@xxxxxxxx>
CC: Stefano Stabellini <sstabellini@xxxxxxxxxx>
CC: Wei Liu <wl@xxxxxxx>
CC: Julien Grall <julien@xxxxxxx>
---
 stubdom/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/stubdom/Makefile b/stubdom/Makefile
index 8cf7131c6a..12aa211ac3 100644
--- a/stubdom/Makefile
+++ b/stubdom/Makefile
@@ -16,7 +16,7 @@ CFLAGS += -O1 -fno-omit-frame-pointer
 
 ifeq (,$(findstring clean,$(MAKECMDGOALS)))
   ifeq ($(wildcard $(MINI_OS)/Config.mk),)
-    $(error Please run `make mini-os-dir' in top-level directory)
+    $(error Please run 'make mini-os-dir' in top-level directory)
   endif
   include $(XEN_ROOT)/Config.mk
 endif
-- 
2.11.0