fixes the use of file(s) (in preamble.yo)

annotations/yo/classes/whennot2use.yo

@@ -21,7 +21,7 @@ the compiler must ignore the tt(inline) keyword and define so-called
 em(virtual members) as true (em(out-of-line))
         hi(out-of-line functions)
     functions. In this situation the vague linkage may cause problems, as the
-compiler must decide in what object file(s) to put their code. Usually that's
+compiler must decide in what object files() to put their code. Usually that's
 not a big problem as long as the function is at least called once. But virtual
 functions are special in the sense that they may very well never be explicitly
 called. On some architectures (e.g., armel) the compiler may fail to compile

annotations/yo/generic/execpol.yo

@@ -26,7 +26,7 @@ or as (see below)
 
 In order to use execution policies the tthi(execution) header file must be
 included, and the linking option ti(-ltbb) must be specified with linking the
-compiled object file(s).
+compiled object files().
 
 There are four types of execution policies (all defined in the tt(std)
 namespace):

annotations/yo/modules.yo

@@ -1,5 +1,3 @@
-NOUSERMACRO(file)
-
 includefile(modules/intro.yo)
 
 sect(An initial, complete module)

annotations/yo/modules/modmap.yo

@@ -88,7 +88,7 @@ modules and partitions; and each inspected sub-directory has received a
 soft-link tt(gcm.cache) to the top-level tt(gcm.cache) sub-directory, allowing
 the files in each sub-directory to import the project's modules. Next,
 the source files in the directories listed in the tt(CLASSES) file (and
-possibly the source file(s) in the top-level diretory itself) can be compiled
+possibly the source files() in the top-level diretory itself) can be compiled
 as usual, e.g., using a build-utility.
 
 COMMENT(

annotations/yo/modules/partitions.yo

@@ -33,7 +33,7 @@ and tt(Utility) are defined as classes in their own partitions:
 tt(Math:Utility) and tt(Math:Add).
 
 hi(partition: syntax) Note that partitions are not em(class) members:
-partitions are specified using only a em(single) colon) instead of two, as
+partitions are specified using only a em(single) colon instead of two, as
 used then defining cass member functions.
 
 The tt(Math) module and its tt(Math) class are exported, so the em(class)

annotations/yo/preamble.yo

@@ -1,5 +1,9 @@
 SUBST(C2a)(tt(C++26))
 
+COMMENT( for 'file(s)' -> f+iles() )
+NOUSERMACRO(iles)
+DEFINEMACRO(files)(0)(CHAR(f)iles(s))
+
 COMMENT(The following macros are used to define upcoming sections and
         files. Once they are available, simply remove the `c' to activate
         them)

annotations/yo/version.yo

@@ -1,2 +1,2 @@
-SUBST(DOCVERSION)(13.0.0)
+SUBST(DOCVERSION)(13.00.00)
 SUBST(YEARS)(1994-2024)