Merge pull request #3997 from yarikoptic/upstream-master

DOC: typos + rewording in examples/notebooks/Cell Magics.ipynb

examples/notebooks/Cell Magics.ipynb

@@ -672,7 +672,7 b''
      "cell_type": "markdown",
      "metadata": {},
      "source": [
-      "Probably the most important magic is the `%cython` magic.  This is similar to the `%%cython_pyximport` magic, but doesn't require you to specify a module name. Instead, the `%%cython` magic uses manages everything using temporary files in the `~/.cython/magic` directory.  All of the symbols in the Cython module are imported automatically by the magic.\n",
+      "Probably the most important magic is the `%cython` magic.  This is similar to the `%%cython_pyximport` magic, but doesn't require you to specify a module name. Instead, the `%%cython` magic manages everything using temporary files in the `~/.cython/magic` directory.  All of the symbols in the Cython module are imported automatically by the magic.\n",
       "\n",
       "Here is a simple example of a Black-Scholes options pricing algorithm written in Cython:"
      ]
@@ -926,14 +926,14 b''
      "metadata": {},
      "source": [
       "One can also easily capture the results of %R into python objects. Like R, the return value of this multiline expression (multiline in the sense that it is separated by ';') is the final value, which is \n",
-      "the *coef(lm(X~Y))*. To pull other variables from R, there is one more magic."
+      "the *coef(lm(X~Y))*."
      ]
     },
     {
      "cell_type": "markdown",
      "metadata": {},
      "source": [
-      "There are two more line magics, %Rpull and %Rget. Both are useful after some R code has been executed and there are variables\n",
+      "To pull other variables from R, there are two more line magics, %Rpull and %Rget. Both are useful after some R code has been executed and there are variables\n",
       "in the rpy2 namespace that one would like to retrieve. The main difference is that one\n",
       " returns the value (%Rget), while the other pulls it to self.shell.user_ns (%Rpull). Imagine we've stored the results\n",
       "of some calculation in the variable \"a\" in rpy2's namespace. By using the %R magic, we can obtain these results and\n",