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

1994/ldb/README.md

@@ -12,7 +12,7 @@ make all
 ```
 
 
-### Bugs and (Mis)features
+### Bugs and (Mis)features:
 
 The current status of this entry is:
 
@@ -32,7 +32,7 @@ some_command | ./ldb
 ```
 
 
-## Try:
+### Try:
 
 ```sh
 ./ldb < /etc/passwd