C#: QL doc adjustments

csharp/ql/src/semmle/code/csharp/controlflow/ControlFlowElement.qll

@@ -126,6 +126,9 @@ class ControlFlowElement extends ExprOrStmtParent, @control_flow_element {
    * ```
    *
    * does not work.
+   *
+   * `cb` records all of the possible condition blocks for this control flow element
+   * that a path from the callable entry point to `succ` may go through.
    */
   pragma[nomagic]
   private predicate immediatelyControlsBlockSplit(

csharp/ql/src/semmle/code/csharp/controlflow/internal/Splitting.qll

@@ -409,7 +409,7 @@ module AssertionSplitting {
    * ```
    *
    * we record whether `i >= 0` evaluates to `true` or `false`, and restrict the
-   * edges out out of the assertion accordingly.
+   * edges out of the assertion accordingly.
    */
   class AssertionSplitImpl extends SplitImpl, TAssertionSplit {
     Assertion a;