c++, options: Just correct a typo.

Signed-off-by: Iain Sandoe <[email protected]>

Author: iains

gcc/c-family/c.opt

@@ -1872,7 +1872,7 @@ Enable the non-attribute syntax for contracts.
 
 fcontracts-nonattr-noconst
 C++ Var(flag_contracts_nonattr_noconst) Init(0)
-Disable the consitification of entities appearing in a contract condition.
+Disable the const-ification of entities appearing in a contract condition.
 
 fcontracts-nonattr-mutable-keyword
 C++ Var(flag_contracts_nonattr_mutable_keyword) Init(0)