--- ray/src/cv/mgflib/mgfdoc.tr	1995/08/28 16:45:59	1.6
+++ ray/src/cv/mgflib/mgfdoc.tr	1995/12/01 11:07:51	1.11
@@ -2388,7 +2388,7 @@ ring - create a circular ring with inner and outer rad
 .SH
 SYNOPSIS
 .LP
-.B cyl
+.B ring
 .I "vc rmin rmax"
 .SH
 DESCRIPTION
@@ -2567,6 +2567,10 @@ In the first form, a single integer is given for the
 of MGF that is to be produced.
 Since MGF is in its first major release, this is not yet a useful
 form, but it will be when the second major release comes out.
+This has the necessary side-effect of expanding all included files.
+(See the
+.UL i
+entity.)\0
 .LP
 In the second form,
 .I mgfilt
@@ -2591,7 +2595,7 @@ mgfilt f,v,p,xf input.mgf > flatpoly.mgf
 .SH
 SEE ALSO
 .LP
-mgf2rad, rad2mgf
+i, mgf2rad, rad2mgf
 .ds RH MGF2RAD
 .bp
 .SH
@@ -3273,8 +3277,10 @@ and return one of the non-zero values from "parser.h" 
 #define MG_EMEM		8		/* out of memory */
 #define MG_ESEEK		9		/* file seek error */
 #define MG_EBADMAT	10		/* bad material specification */
+#define MG_ELINE		11		/* input line too long */
+#define MG_ECNTXT		12		/* unmatched context close */
 
-#define MG_NERRS	11
+#define MG_NERRS	13
 .DE
 If it is inappropriate to send output to standard error, the calling
 program should use the routines listed under
@@ -3358,7 +3364,10 @@ The
 function reads the next input line from the current file,
 returning the number of characters in the line, or zero if the
 end of file is reached or there is a file error.
-The function skips over escaped newlines, and keeps track of the
+If the value returned equals MG_MAXLINE-1,
+then the input line was too long, and you
+should return an MG_ELINE error.
+The function keeps track of the
 line number in the current file context
 .I mg_file,
 which also contains the line that was read.