[BRLTTY] BRLTTY in GRUB2

[Dave Mielke]

grub_error() takes a format string. How does the user-supplied string mesh with 
the information that the function itself fills in? Are there, for example, 
special % characters that fill in different properties of the error?

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Dave Mielke           | 2213 Fox Crescent | The Bible is the very Word of God.
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