Revert "-fexceptions does not, in fact, enable C++ exceptions"

In fact it does. For the driver anyway, and not cc1 which I'm supposed
to pretend doesn't exist.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@133673 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/LanguageExtensions.html b/docs/LanguageExtensions.html
index 551e17f..cce2e8c 100644
--- a/docs/LanguageExtensions.html
+++ b/docs/LanguageExtensions.html
@@ -389,7 +389,7 @@
 <h3 id="cxx_exceptions">C++ exceptions</h3>
 
 <p>Use <tt>__has_feature(cxx_exceptions)</tt> to determine if C++ exceptions have been enabled. For
-example, compiling code with <tt>-fexceptions</tt> and <tt>-fc++-exceptions</tt> enables C++ exceptions.</p>
+example, compiling code with <tt>-fexceptions</tt> enables C++ exceptions.</p>
 
 <h3 id="cxx_rtti">C++ RTTI</h3>