Replace tab with spaces

examples/Makefile

@@ -197,7 +197,7 @@ ifeq ($(TARGET_PLATFORM),PLATFORM_ANDROID)
     MAKE = mingw32-make
 endif
 ifeq ($(TARGET_PLATFORM),PLATFORM_WEB)
-	EMMAKE != type emmake
+    EMMAKE != type emmake
     ifneq (, $(EMMAKE))
         MAKE = emmake make
     else