Fix format of markdown query help files

java/ql/src/Performance/StringReplaceAllWithNonRegex.md

@@ -1,7 +1,3 @@
-# Use of `String#replaceAll` with a first argument which is not a regular expression
-
-Using `String#replaceAll` is less performant than `String#replace` when the first argument is not a regular expression.
-
 ## Overview
 
 The `String#replaceAll` method is designed to work with regular expressions as its first parameter. When you use a simple string without any regex patterns (like special characters or syntax), it's more efficient to use `String#replace` instead. This is because `replaceAll` has to compile the input as a regular expression first, which adds unnecessary overhead when you are just replacing literal text.

java/ql/src/Violations of Best Practice/Undesirable Calls/DoNotCallFinalize.md

@@ -19,7 +19,6 @@ void main() {
     // ...
     cache.finalize(); // NON_COMPLIANT
 }
-
 ```
 
 ```java
@@ -43,10 +42,9 @@ void main() {
         // ...
     }
 }
-
 ```
 
-# Implementation Notes
+## Implementation Notes
 
 This rule ignores `super.finalize()` calls that occur within `finalize()` overrides since calling the superclass finalizer is required when overriding `finalize()`. Also, although overriding `finalize()` is not recommended, this rule only alerts on direct calls to `finalize()` and does not alert on method declarations overriding `finalize()`.