What does -= stand for?

-= stands for "Snuffed candle to end a flame message"

How to abbreviate "Snuffed candle to end a flame message"?

"Snuffed candle to end a flame message" can be abbreviated as -=

What is the meaning of -= abbreviation?

The meaning of -= abbreviation is "Snuffed candle to end a flame message"

What does -= mean?

-= as abbreviation means "Snuffed candle to end a flame message"