git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201633
91177308-0d34-0410-b5e6-
96231b3b80d8
/// which is a very useful tool for interprocedural optimization.
///
/// Every function in a module is represented as a node in the call graph. The
-/// callgraph node keeps track of which functions the are called by the
-/// function corresponding to the node.
+/// callgraph node keeps track of which functions are called by the function
+/// corresponding to the node.
///
/// A call graph may contain nodes where the function that they correspond to
/// is null. These 'external' nodes are used to represent control flow that is