Identify replacement variables in the generated manual page to
ease their substitutions.
Usage
identifyReplacementVariables(filename_s)
Arguments
filename_s
An unconstrained vector of string values that are the source filenames
Value
When producing a manual page using produceManualPage function,
under format-driven mode, sections will be generated with a very simple content
based on format 'XXX_???' to ease post processing substitutions and
hand-crafted replacements.