fix standard headers and header spacing in winner README.md files

2006/sloane/README.md

@@ -20,7 +20,8 @@ make alt
 To see why we recommend the alternate version instead of the original version,
 see the [original code](#original-code) section.
 
-## Try:
+
+### Try:
 
 This alternate version, which we recommend that you use in order to see what is
 happening with modern systems, and to not flash too quickly, which can be
@@ -41,6 +42,7 @@ make CDEFINE="-DS=0" clobber alt
 ./sloane.alt
 ```
 
+
 ## Original code:
 
 Should you wish to see the original without having to mess with the compiler