Why is the inline string block in Ruby named "eos"? [closed]

Question

Why is the inline string block in Ruby named "eos"?

Update

Thank you for denoting the right way. I always thought that "eos" was a reserved word, but it seems that any word may be used:

a = <<MYSTRING
line 1
line 2
mystring #the thing is case sensitive
line3
MYSTRING
#The actual end of the string

I also discovered that this construction is named Heredoc

This showed me that even the silliest questions can be a learning opportunity.

Answer 1

EOS means end of string. it is displayed at the end of the string.

EOS means more than GFJKDHAGJHFGDJ for example.

But you can use other names, too.