Make comment more concise in C++ API.

Change: 142065959

tensorflow/cc/framework/scope.h

@@ -203,7 +203,7 @@ class Scope {
   // A NameMap is used to keep track of suffixes for names used in a scope. A
   // name that has not been used so far in a scope will get no suffix. Later
   // uses of the same name will get suffixes _1, _2, _3, etc. Multiple scopes
-  // can be sharing the same NameMap. For instance, a new scope created using
+  // can share the same NameMap. For instance, a new scope created using
   // WithControlDependencies() should would share the same NameMap with the
   // parent.
   typedef std::unordered_map<string, int> NameMap;