Replace invalid characters with HTML entities

— with —
’ with ’
+ with +
× with x
ç with ç
“ with “
” with ”
‘ with ‘
• with •
– with -
µ with µ
† with †
Fix C++
θ with θ
Yen symbol instead of times
Fix broken apos
Bullet again
E-circumflex

25-04.html

@@ -43,7 +43,7 @@
 ;  to memory that already contains data.
 ; By Michael Abrash.
 ;
-stack   segment para stack ‘STACK’
+stack   segment para stack ‘STACK’
         db      512 dup(?)
 stack   ends
 ;
@@ -66,11 +66,11 @@ SETSC   macro   INDEX, SETTING
         dec     dx
         endm
 ;
-cseg    segment para public ‘CODE#146;
+cseg    segment para public ‘CODE#146;
         assume  cs:cseg
 start   proc    near
 ;
-; Select 640×480 graphics mode.
+; Select 640x480 graphics mode.
 ;
         mov     ax,012h
         int     10h