Add [Abrahams01] bibliography entry for exception-safety (#991)

Link to it when talking about the strong and basic exception-safety
guarantees.

Add it to the dictionary.

CppCoreGuidelines.md

@@ -5658,7 +5658,7 @@ It is simple and efficient. If you want to optimize for rvalues, provide an over
 
 ##### Note
 
-The `swap` implementation technique offers the [strong guarantee](???).
+The `swap` implementation technique offers the [strong guarantee](#Abrahams01).
 
 ##### Example
 
@@ -5687,7 +5687,7 @@ But what if you can get significantly better performance by not making a tempora
         return *this;
     }
 
-By writing directly to the target elements, we will get only [the basic guarantee](#???) rather than the strong guarantee offered by the `swap` technique. Beware of [self-assignment](#Rc-copy-self).
+By writing directly to the target elements, we will get only [the basic guarantee](#Abrahams01) rather than the strong guarantee offered by the `swap` technique. Beware of [self-assignment](#Rc-copy-self).
 
 **Alternatives**: If you think you need a `virtual` assignment operator, and understand why that's deeply problematic, don't call it `operator=`. Make it a named function like `virtual void assign(const Foo&)`.
 See [copy constructor vs. `clone()`](#Rc-copy-virtual).
@@ -21361,6 +21361,8 @@ Alternatively, we will decide that no change is needed and delete the entry.
 
 # Bibliography
 
+* <a name="Abrahams01"></a>
+  \[Abrahams01]:  D. Abrahams. [Exception-Safety in Generic Components](http://www.boost.org/community/exception_safety.html).
 * <a name="Alexandrescu01"></a>
   \[Alexandrescu01]:  A. Alexandrescu. Modern C++ Design (Addison-Wesley, 2001).
 * <a name="Cplusplus03"></a>

scripts/hunspell/isocpp.dic

@@ -23,6 +23,8 @@ ABA
 abi
 ABI
 ABIs
+Abrahams
+Abrahams01
 abstr
 accessor
 ack