Clarify up `Rv' and `Ex' documentation.

1 files changed, 20 insertions, 10 deletions

diff --git a/mdoc.7 b/mdoc.7
index 6f211e47..784a7be0 100644
--- a/mdoc.7
+++ b/mdoc.7
@@ -1821,16 +1821,20 @@ See also
 .Sx \&Dv
 for general constants.
 .Ss \&Ex
-Insert a standard sentence regarding exit values.
+Insert a standard sentence regarding command exit values of 0 on success
+and >0 on failure.
 Its syntax is as follows:
 .Pp
-.D1 Pf \. Sx \&Ex Fl std Op Ar utility
+.D1 Pf \. Sx \&Ex Fl std Op Ar utility...
 .Pp
-When
+If
 .Ar utility
 is not specified, the document's name set by
 .Sx \&Nm
 is used.
+Multiple
+.Ar utility
+arguments are treated as separate utilities.
 .Pp
 See also
 .Sx \&Rv .
@@ -2462,16 +2466,22 @@ block is used within a SEE ALSO section, a vertical space is asserted
 before the rendered output, else the block continues on the current
 line.
 .Ss \&Rv
-Inserts text regarding a function call's return value.
-This macro must consist of the
-.Fl std
-argument followed by an optional
-.Ar function .
+Insert a standard sentence regarding a system call's return value of 0
+on success and \-1 on error, with the
+.Va errno
+libc global variable set on error.
+Its syntax is as follows:
+.Pp
+.D1 Pf \. Sx \&Rv Fl std Op Ar function...
+.Pp
 If
 .Ar function
-is not provided, the document's name as stipulated by the first
+is not specified, the document's name set by
 .Sx \&Nm
-is provided.
+is used.
+Multiple
+.Ar function
+arguments are treated as separate functions.
 .Pp
 See also
 .Sx \&Ex .