mdocml: improve documentation of .Fa, .Va, and .Vt; inspired by a

mdocml: improve documentation of .Fa, .Va, and .Vt; inspired by a

[schwarze]

Log Message:
-----------
improve documentation of .Fa, .Va, and .Vt;
inspired by a discussion with matthew@

Modified Files:
--------------
    mdocml:
        mdoc.7

Revision Data
-------------
Index: mdoc.7
===================================================================
RCS file: /usr/vhosts/mdocml.bsd.lv/cvs/mdocml/mdoc.7,v
retrieving revision 1.238
retrieving revision 1.239
diff -Lmdoc.7 -Lmdoc.7 -u -p -r1.238 -r1.239
--- mdoc.7
+++ mdoc.7
@@ -1570,7 +1570,7 @@ arguments are treated as separate utilit
 See also
 .Sx \&Rv .
 .Ss \&Fa
-Function argument.
+Function argument or parameter.
 Its syntax is as follows:
 .Bd -ragged -offset indent
 .Pf \. Sx \&Fa
@@ -2704,8 +2704,17 @@ A variable name.
 Examples:
 .Dl \&.Va foo
 .Dl \&.Va const char *bar ;
+.Pp
+For function arguments and parameters, use
+.Sx \&Fa
+instead.
+For declarations of global variables in the
+.Em SYNOPSIS
+section, use
+.Sx \&Vt .
 .Ss \&Vt
 A variable type.
+.Pp
 This is also used for indicating global variables in the
 .Em SYNOPSIS
 section, in which case a variable name is also specified.
@@ -2720,18 +2729,21 @@ In the former case, this macro starts a 
 and a blank line is inserted in front if there is a preceding
 function definition or include directive.
 .Pp
-Note that this should not be confused with
-.Sx \&Ft ,
-which is used for function return types.
-.Pp
 Examples:
 .Dl \&.Vt unsigned char
 .Dl \&.Vt extern const char * const sys_signame[] \&;
 .Pp
+For parameters in function prototypes, use
+.Sx \&Fa
+instead, for function return types
+.Sx \&Ft ,
+and for variable names outside the
+.Em SYNOPSIS
+section
+.Sx \&Va ,
+even when including a type with the name.
 See also
-.Sx MANUAL STRUCTURE
-and
-.Sx \&Va .
+.Sx MANUAL STRUCTURE .
 .Ss \&Xc
 Close a scope opened by
 .Sx \&Xo .
--
 To unsubscribe send an email to source+unsubscribe@mdocml.bsd.lv