fix tip to use 10%

issues/issue-10/50_TIPS.html

@@ -7,7 +7,7 @@ To improve performances or avoid disk i/o, one may mount /tmp in memory (mfs). A
 <pre>
 # sed -i '/\/tmp /s/^/\#/' /etc/fstab
 # printf "swap /tmp mfs rw,nodev,nosuid,-s=%sB 0 0\n" \
-    $(dmesg |awk '/avail mem/ { print $4 }') \
+    $(dmesg |awk '/avail mem/ { print $4 /10 }') \
 	>> /etc/fstab
 # chmod 1777 /tmp
 # mount -a