Indent with tabs, not spaces

dust/makefile

 CC = cc -O2
 
 .c.o :
-        $(CC) -c $<
+	$(CC) -c $<
 
 dust: tust.o dust.o getfa.o
-        $(CC) -o dust tust.o dust.o getfa.o
+	$(CC) -o dust tust.o dust.o getfa.o
 clean:
-        rm *.o dust
+	rm *.o dust
 
 install:
-        install -d ../bin
-        install dust ../bin
+	install -d ../bin
+	install dust ../bin