pretty-formats: define "literal formatting code"

The description for a %(trailer) option already uses this term without
having a definition anywhere in the document, and we are about to add
another one in %(decorate) that uses it.

Signed-off-by: Junio C Hamano <[email protected]>
Signed-off-by: Andy Koppe <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: gitster

Documentation/pretty-formats.txt

@@ -122,7 +122,9 @@ The placeholders are:
 - Placeholders that expand to a single literal character:
 '%n':: newline
 '%%':: a raw '%'
-'%x00':: print a byte from a hex code
+'%x00':: '%x' followed by two hexadecimal digits is replaced with a
+	 byte with the hexadecimal digits' value (we will call this
+	 "literal formatting code" in the rest of this document).
 
 - Placeholders that affect formatting of later placeholders:
 '%Cred':: switch color to red