Added RDCPM and EDLIN, style fixes

Added the reconstructed source code of RDCPM.COM and EDLIN.COM, and changed the style of the other source files to match Tim Paterson's coding style.

SYS.ASM

@@ -26,11 +26,11 @@ START:
 	MOV	AH,1
 	INT	38
 	JC	WRERR
-	MOV	DX,TRANSOK
+	MOV	DX,SYSOK
 	JP	QUIT
 
 RDERR:
-	MOV	DX,RDERMSG
+	MOV	DX,ERREAD
 
 QUIT:
 	MOV	AH,9
@@ -38,21 +38,17 @@ QUIT:
 	INT	32
 
 WRERR:
-	MOV	DX,WRERMSG
+	MOV	DX,ERWRIT
 	JP	QUIT
 
 BADDRV:
-	MOV	DX,BADDRVMSG
+	MOV	DX,DRVBAD
 	JP	QUIT
 
-TRANSOK:
-	DB	"System transfered$"
-RDERMSG:
-	DB	"Disk read error$"
-WRERMSG:
-	DB	"Disk write error$"
-BADDRVMSG:
-	DB	"Bad drive specification"
+SYSOK:	DB	"System transfered$"
+ERREAD:	DB	"Disk read error$"
+ERWRIT:	DB	"Disk write error$"
+DRVBAD:	DB	"Bad drive specification"
 
 END:
-
+