improve layout of 1996/august/index.html

Improved indenting of information in a code block.

Ran `bin/readme2index.sh -v 1 1996/august` to perform the above.

1996/august/README.md

@@ -244,7 +244,7 @@ Terminals are in quotes, `()` is used for bracketing.
 
     whilestmt:	"while" "(" expr ")" stmt
 
-    dowhilestmt:	"do" stmt "while" "(" expr ")" ";"
+    dowhilestmt:"do" stmt "while" "(" expr ")" ";"
 
     expr:	expr binop expr
 		    unop expr

1996/august/index.html

@@ -292,7 +292,7 @@ defined. <code>getchar()</code> and <code>putchar()</code> are predefined functi
 
     whilestmt:  &quot;while&quot; &quot;(&quot; expr &quot;)&quot; stmt
 
-    dowhilestmt:        &quot;do&quot; stmt &quot;while&quot; &quot;(&quot; expr &quot;)&quot; &quot;;&quot;
+    dowhilestmt:&quot;do&quot; stmt &quot;while&quot; &quot;(&quot; expr &quot;)&quot; &quot;;&quot;
 
     expr:       expr binop expr
                     unop expr