About colon in md files

[fxlb]

Example in draft-ietf-opsawg-pcap.md

Magic Number (32 bits):
: an unsigned magic number, whose value is either the hexadecimal number

There are two colons. This gives, displayed on github:

Magic Number (32 bits): : an unsigned magic number, whose [...] 

Why this formating?

[fxlb]

It seems it is from kramdown syntax for a definition list.