Fix example for mxnet.nd.contrib.cond and fix typo in src/engine

python/mxnet/ndarray/contrib.py

@@ -436,8 +436,8 @@ def cond(pred, then_func, else_func):
     --------
     >>> a, b = mx.nd.array([1]), mx.nd.array([2])
     >>> pred = a * b < 5
-    >>> then_func = lambda a, b: (a + 5) * (b + 5)
-    >>> else_func = lambda a, b: (a - 5) * (b - 5)
+    >>> then_func = lambda: (a + 5) * (b + 5)
+    >>> else_func = lambda: (a - 5) * (b - 5)
     >>> outputs = mx.nd.contrib.cond(pred, then_func, else_func)
     >>> outputs[0]
     [42.]

src/engine/engine.cc

@@ -48,7 +48,7 @@ inline Engine* CreateEngine() {
   ret = CreateNaiveEngine();
   #endif
 
-  if (ret ==nullptr) {
+  if (ret == nullptr) {
     LOG(FATAL) << "Cannot find Engine " << type;
   }
   if (!default_engine) {

src/engine/threaded_engine.h

@@ -182,7 +182,7 @@ class ThreadedVar final
  private:
   // TODO(hotpxl) change this to spinlock for faster runtime
   // TODO(hotpxl) consider rename head
-  /*! \brief inetrnal mutex of the ThreadedVar */
+  /*! \brief internal mutex of the ThreadedVar */
   std::mutex mutex_;
   /*!
    * \brief number of pending reads operation in the variable.