Possible manual typo

[Reuben Thomas]

In the following:

@anchor{AC_RUN_IFELSE}
@defmac AC_RUN_IFELSE (@var{input}, @ovar{action-if-true}, @
  @ovar{action-if-false}, @dvar{action-if-cross-compiling, AC_MSG_FAILURE})
@acindex{RUN_IFELSE}
If @var{program} compiles and links successfully and returns an exit
status of 0 when executed, run shell commands @var{action-if-true}.
Otherwise, run shell commands @var{action-if-false}.

I can't see a referent for "@var{program}". Presumably either the
"input" parameter should be renamed "program" or the reference to
"program" should be made a reference to "input"; if you let me know
which, I'll prepare a patch.

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