Fix a couple of factual/grammatical errors

Author: WeatherGod

AnatomyOfMatplotlib-Part3-HowToSpeakMPL.ipynb

@@ -230,7 +230,7 @@
    "metadata": {},
    "source": [
     "# Plot attributes\n",
-    "With just about any plot you can make, there are many attributes that can be modified to make the lines and markers suit your needs. Note that for many plotting functions, Matplotlib will cycle the colors for each dataset you plot. However, you are free to explicitly state which colors you want used for which plots. For the [`plt.plot()`](http://matplotlib.org/api/pyplot_api.html#matplotlib.pyplot.plot) and [`plt.scatter()`](http://matplotlib.org/api/pyplot_api.html#matplotlib.pyplot.scatter) functions, you can mix the specification for the colors, linestyles, and markers in a single string."
+    "With just about any plot you can make, there are many attributes that can be modified to make the lines and markers suit your needs. Note that for many plotting functions, Matplotlib will cycle the colors for each dataset you plot. However, you are free to explicitly state which colors you want used for which plots. For [`plt.plot()`](http://matplotlib.org/api/pyplot_api.html#matplotlib.pyplot.plot), you can mix the specification for the colors, linestyles, and markers in a single string."
    ]
   },
   {
@@ -486,7 +486,7 @@
     "* \\*   - stars\n",
     "     \n",
     "Letters can be combined, in which case all the specified\n",
-    "hatchings are done.  If same letter repeats, it increases the\n",
+    "hatchings are done.  Repeating a character increases the\n",
     "density of hatching of that pattern."
    ]
   },