Link sections on throw and handling exceptions (#1005)

* Link sections on `throw` and handling exceptions

Fixes #776

Links are added in both directions between §21.4 and §13.10.6.

* Update standard/exceptions.md

Co-authored-by: Bill Wagner <[email protected]>

---------

Co-authored-by: Mads Torgersen <[email protected]>

Author: BillWagner

standard/exceptions.md

@@ -25,7 +25,7 @@ The value of these properties can be specified in calls to the instance construc
 
 Exceptions are handled by a `try` statement ([§13.11](statements.md#1311-the-try-statement)).
 
-When an exception occurs, the system searches for the nearest catch clause that can handle the exception, as determined by the run-time type of the exception. First, the current method is searched for a lexically enclosing `try` statement, and the associated `catch` clauses of the `try` statement are considered in order. If that fails, the method that called the current method is searched for a lexically enclosing `try` statement that encloses the point of the call to the current method. This search continues until a `catch` clause is found that can handle the current exception, by naming an exception class that is of the same class, or a base class, of the run-time type of the exception being thrown. A `catch` clause that doesn’t name an exception class can handle any exception.
+When an exception is thrown (§21.2), the system searches for the nearest catch clause that can handle the exception, as determined by the run-time type of the exception. First, the current method is searched for a lexically enclosing `try` statement, and the associated `catch` clauses of the `try` statement are considered in order. If that fails, the method that called the current method is searched for a lexically enclosing `try` statement that encloses the point of the call to the current method. This search continues until a `catch` clause is found that can handle the current exception, by naming an exception class that is of the same class, or a base class, of the run-time type of the exception being thrown. A `catch` clause that doesn’t name an exception class can handle any exception.
 
 Once a matching `catch` clause is found, the system prepares to transfer control to the first statement of the `catch` clause. Before execution of the `catch` clause begins, the system first executes, in order, any `finally` clauses that were associated with `try` statements more nested that than the one that caught the exception.
 

standard/statements.md

@@ -1546,7 +1546,7 @@ A `throw` statement with no expression can be used only in a `catch` block, in w
 
 Because a `throw` statement unconditionally transfers control elsewhere, the end point of a `throw` statement is never reachable.
 
-When an exception is thrown, control is transferred to the first `catch` clause in an enclosing `try` statement that can handle the exception. The process that takes place from the point of the exception being thrown to the point of transferring control to a suitable exception handler is known as ***exception propagation***. Propagation of an exception consists of repeatedly evaluating the following steps until a `catch` clause that matches the exception is found. In this description, the ***throw point*** is initially the location at which the exception is thrown.
+When an exception is thrown, control is transferred to the first `catch` clause in an enclosing `try` statement that can handle the exception. The process that takes place from the point of the exception being thrown to the point of transferring control to a suitable exception handler is known as ***exception propagation***. Propagation of an exception consists of repeatedly evaluating the following steps until a `catch` clause that matches the exception is found. In this description, the ***throw point*** is initially the location at which the exception is thrown. This behavior is specified in (§21.4).
 
 - In the current function member, each `try` statement that encloses the throw point is examined. For each statement `S`, starting with the innermost `try` statement and ending with the outermost `try` statement, the following steps are evaluated: