different memory info format

[jingpengw]

this is a funny website. my free in ubuntu14.04 shows an extra line of -/+ buffers/cache:.
this shows the real free memory I think.

[koalaman]

Thanks! You're right, this is the old format that was used up until ~2016.

LinuxAteMyRam.com showed both formats up until earlier this year, when it was finally retired in favor of the new format. I re-added a note about this.