fixed missing readi, added some missing whitespace

pages/e01-01

@@ -1,4 +1,5 @@
 / u1 -- unix
+
 unkni: / used for all system calls
 sysent:
 	incb	sysflg / indicate a system routine is

pages/e06-01

@@ -1,5 +1,6 @@
 / u6 -- unix
-read:
+
+readi:
 	clr	u.nread / accumulates number of bytes transmitted
 	tst	u.count / is number of bytes to be read greater than 0
 	bgt	1f / yes, branch
@@ -37,6 +38,7 @@ read:
 	rcvt / tty6
 	rcvt / tty7
 	rcrd/ crd
+
 rtty: / read from console tty
 	mov	tty+[8*ntty]-8+6,r5 / r5 is the address of the 4th word of
 				    / of the control and status block _

pages/e06-02

@@ -1,8 +1,10 @@
 	dec	2(r5) / decrement the character count
 	jsr	r0,passc / move the character to core (user)
 	br	1b / get next character
+
 ret1:
 	jmp	ret / return to caller via 'ret'
+
 rppt: / read paper tape
 	jsr	r0,pptic / gets next character in clist for ppt input and
 			 / places
@@ -47,6 +49,7 @@ dskr:
 	tst	u.count / all bytes read off disk
 	bne	dskr
 	br	ret
+
 passc:
 	movb	r1,*u.base / move a character to the next byte of the
 		           / users buffer

pages/e06-03

@@ -6,9 +6,10 @@
 		         / 'readi' by:
 ret: / (1) pop the return address off the stack into r0
 	mov	(sp)+,r1 / (2) pup the i-number off the stack into r1
-1 : .
+1:
 	clr	*$ps / clear processor status
 	rts	r0 / return to address currently on top of stack
+
 writei:
 	clr	u.nread / clear the number of bytes transmitted during
 		        / read or write calls

pages/e06-04

@@ -41,14 +41,15 @@ wmem: / transfer characters from a user area of core to memory file
 	br	wmem / continue
 1:
 	jmp	error / ?
+
 dskw: / write routine for non-special files
 	mov	(sp),r1 / get an i-node number from the stack into r1
 	jsr	r0,iget / write i-node out (if modified), read i-node 'r1'
 		        / into i-node area of core
-	 mov	 *u.fofp,r2 / put the file offset [(u.off) or the offset in
+	mov	 *u.fofp,r2 / put the file offset [(u.off) or the offset in
 		            / the fsp entry for this file] in r2
-	 add	 u.count,r2 / no. of bytes to be written + file offset is
+	add	 u.count,r2 / no. of bytes to be written + file offset is
 		            / put in r2
-	 cmp	 r2,i.size / is this greater than the present size of
+	cmp	 r2,i.size / is this greater than the present size of
 		           / the file?
-	 blos	 1f / no, branch
+	blos	 1f / no, branch