Fix code blocks in 1991 and part of 1992

In 1991 the code blocks in the html files should look better with
smaller screens.  In one entry, rince, an image was added as the
formatting is too complicated to get right. The text was changed from
two columns to one column and then a screenshot was taken so that it's a
bit easier to see with smaller widths. This looks fairly good on mobile
phones too. The only downside, of course, is if the web pages ever
change to have a different background or code colour it won't match but
it did not look right with mobile phones. This required a manifest
update.

In 1992 one entry's html file defeated me for now so I had to stop. This
can be looked at later. The last entry I am committing changes to is
1991/buzzard.1. It was buzzard.2/buzzard.2.design.md that is a big
problem and will have to be done another time.

1991/westley/README.md

@@ -56,7 +56,7 @@ game:
 
 ``` <!---sh-->
     make ttt
-    ./ttt [first_move]  # <- omit first arg to have it move first
+    ./ttt [first_move]
     ./ttt next_move
 ```
 
@@ -65,8 +65,12 @@ The shell script determines when the game is over, and automatically replaces
 loss).  The [ttt](%%REPO_URL%%/1991/westley/ttt.sh) script has two other modes:
 
 ``` <!---sh-->
-    ./ttt quitgame      # cancel any game in progress, revert to merlyn.c
-    ./ttt clobber       # remove all game files, revert to original source
+     # cancel any game in progress,
+     # revert to merlyn.c:
+    ./ttt quitgame
+     # remove all game files,
+     # revert to original source:
+    ./ttt clobber
 ```
 
 For example here is a potentially losing game:
@@ -77,42 +81,10 @@ For example here is a potentially losing game:
     ./ttt 6
 ```
 
-The final might look like:
+To see what it might look like, try it out.
 
-
-``` <!---c-->
-                    a(X){/*/X=-         a(X){/*/X=-
-            X       -1;F;X=-            -1;F;X=-
-                    -1;F;}/*/           -1;F;}/*/
-    char z[][100]={"char z[][100]={","a(X){/*/X=-","-1;F;X=-","-1;F;}/*/","1999999999  :-) ",
-    "int q,i,j,k,X,O=0,H;S(x)int*x;{X+=X;O+=O;*x+1?*x+2||X++:O++;*x=1;}L(n){for(*",
-    "z[i=1]=n+97;i<4;i++)M(256),s(i),M(128),s(i),M(64),N;X*=8;O*=8;}s(R){char*r=z",
-    "[R];for(q&&Q;*r;)P(*r++);q&&(Q,P(44));}M(m){P(9);i-2||P(X&m?88:O&m?48:32);P(",
-    "9);}y(A){for(j=8;j;)~A&w[--j]||(q=0);}e(W,Z){for(i-=i*q;i<9&&q;)y(W|(1<<i++&",
-    "~Z));}R(){for(k=J[*J-48]-40;k;)e(w[k--],X|O);}main(u,v)char**v;{a(q=1);b(1);",
-    "c(1);*J=--u?O?*J:*v[1]:53;X|=u<<57-*v[u];y(X);K=40+q;q?e(O,X),q&&(K='|'),e(X",
-    ",O),R(),O|=1<<--i:J[*J-48+(X=O=0)]--;L(q=0);for(s(i=0);q=i<12;)s(i++),i>4&&N",
-    ";s(q=12);P(48);P('}');P(59);N;q=0;L(1);for(i=5;i<13;)s(i++),N;L(2);}",0};
-                    b(X){/*/X=-         b(X){/*/X=-
-            X       -1;F;X=-            -1;F;X=-        X
-                    -1;F;}/*/           -1;F;}/*/
-    int q,i,j,k,X,O=0,H;S(x)int*x;{X+=X;O+=O;*x+1?*x+2||X++:O++;*x=1;}L(n){for(*
-    z[i=1]=n+97;i<4;i++)M(256),s(i),M(128),s(i),M(64),N;X*=8;O*=8;}s(R){char*r=z
-    [R];for(q&&Q;*r;)P(*r++);q&&(Q,P(44));}M(m){P(9);i-2||P(X&m?88:O&m?48:32);P(
-    9);}y(A){for(j=8;j;)~A&w[--j]||(q=0);}e(W,Z){for(i-=i*q;i<9&&q;)y(W|(1<<i++&
-    ~Z));}R(){for(k=J[*J-48]-40;k;)e(w[k--],X|O);}main(u,v)char**v;{a(q=1);b(1);
-    c(1);*J=--u?O?*J:*v[1]:53;X|=u<<57-*v[u];y(X);K=40+q;q?e(O,X),q&&(K='|'),e(X
-    ,O),R(),O|=1<<--i:J[*J-48+(X=O=0)]--;L(q=0);for(s(i=0);q=i<12;)s(i++),i>4&&N
-    ;s(q=12);P(48);P('}');P(59);N;q=0;L(1);for(i=5;i<13;)s(i++),N;L(2);}
-                    c(X){/*/X=-         c(X){/*/X=-
-            0       -1;F;X=-      0     -1;F;X=-        0
-                    -1;F;}/*/           -1;F;}/*/
-
-    ttt: I win!
-```
-
-Redirects stderr to `/dev/null` by default. If you need errors or warnings use
-`-e`.
+The script redirects stderr to `/dev/null` by default. If you need errors or
+warnings use `-e`.
 
 
 ## Alternate code:
@@ -233,7 +205,8 @@ e.g. the template:
 ```
     . . .
     O , O    (this is the value 40; 2^3+2^5)
-    . . .    ("O"s are 1 bits, "." and "," are 0 bits)
+    . . .    ("O"s are 1 bits,
+              "." and "," are 0 bits)
 ```
 
 ...will make the `e()` function return a center move, as this is the only move