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doc: cookbook: Use @var for meta-syntactic variables. 

* doc/guix-cookbook.texi (Extended example): Use @var for meta-syntactic
variables in 'modify-phases' description.
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Ludovic Courtès 2020-10-15 15:24:07 +02:00
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@ -1067,16 +1067,16 @@ the following forms:
@itemize
@item
@code{(add-before PHASE NEW-PHASE PROCEDURE)}: Run @code{PROCEDURE} named @code{NEW-PHASE} before @code{PHASE}.
@code{(add-before @var{phase} @var{new-phase} @var{procedure})}: Run @var{procedure} named @var{new-phase} before @var{phase}.
@item
@code{(add-after PHASE NEW-PHASE PROCEDURE)}: Same, but afterwards.
@code{(add-after @var{phase} @var{new-phase} @var{procedure})}: Same, but afterwards.
@item
@code{(replace PHASE PROCEDURE)}.
@code{(replace @var{phase} @var{procedure})}.
@item
@code{(delete PHASE)}.
@code{(delete @var{phase})}.
@end itemize
The @code{PROCEDURE} supports the keyword arguments @code{inputs} and @code{outputs}. Each
The @var{procedure} supports the keyword arguments @code{inputs} and @code{outputs}. Each
input (whether @emph{native}, @emph{propagated} or not) and output directory is referenced
by their name in those variables. Thus @code{(assoc-ref outputs "out")} is the store
directory of the main output of the package. A phase procedure may look like