string, the usual C backslash characters are honored: `\\b', `\\f',
`\\n', `\\r', and `\\t'. Continuation lines in format files end with
`\\' followed by the newline character.
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.\" TALK ABOUT SYNTAX FIRST, THEN SEMANTICS
.SS SYNTAX
Format strings are built around
component, they are listed without a leading `%'. When control escapes
are used as function arguments, they written as normally, with
a leading `%';
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.SS "Control escapes"
.PP
A
For string valued functions or components, the condition is true
if the function return or component value is
a non-empty string, and false for an empty string.
-
.PP
The `%?' control escape is optional, and may there may be more
than one `%?' control escape in a conditional block.
The `%|' control escape
is also optional, but may be included at most once.
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.SS "Function escapes"
Functions expecting an argument generally
require an argument of a particular type.
at 4 digits.
.SH "SEE ALSO"
scan(1), repl(1), ap(8), dp(8)
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.SH CONTEXT
None