change to a sentence

code/chap02.ipynb

@@ -395,7 +395,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Put the shuffled phases back into the spectrum.  Each element in `hs` is a complex number with magitude $A$ and phase $\\phi$, we we compute $A e^{i \\phi}$"
+    "Put the shuffled phases back into the spectrum.  Each element in `hs` is a complex number with magitude $A$ and phase $\\phi$, with which we can compute $A e^{i \\phi}$"
    ]
   },
   {