Removed (pretty inconsistently used) tab chars from source code base.

libsrc/common/toupper.s

@@ -4,18 +4,18 @@
 ; int toupper (int c);
 ;
 
-	.export		_toupper
-	.import		__ctype
+        .export         _toupper
+        .import         __ctype
 
 _toupper:
         cpx     #$00            ; Outside valid range?
         bne     L9              ; If so, return the argument unchanged
-	tay			; Get c into Y
-	lda	__ctype,y	; Get character classification
-	lsr	a		; Get bit 0 (lower char) into carry
-	tya			; Get C back into A
-       	bcc    	L9		; Jump if not lower char
-       	clc
-       	adc    	#<('A'-'a')     ; make upper case char
-L9:	rts	  		; CC are set
+        tay                     ; Get c into Y
+        lda     __ctype,y       ; Get character classification
+        lsr     a               ; Get bit 0 (lower char) into carry
+        tya                     ; Get C back into A
+        bcc     L9              ; Jump if not lower char
+        clc
+        adc     #<('A'-'a')     ; make upper case char
+L9:     rts                     ; CC are set