Merge pull request #17 from QuantEcon/fix_figure_amss3

fix figure amss_g3 of amss3.rst (Issue#16)

Author: mmcky

rst_files/amss3.rst

@@ -195,7 +195,7 @@ the part value of government debt
 
 We obtain the following graph for the historgram of the last 100,000 observations on the par value of government debt
 
-  .. figure:: /_static/figures/amss3_g3.png
+.. figure:: /_static/figures/amss3_g3.png
 
 The  black vertical line denotes the sample mean for the last 100,000 observations included in the historgram; the  green vertical line denots the
 value of :math:`\frac{ {\mathcal B}^*}{E u_c}`, associated with the sample (presumably) from
@@ -720,4 +720,4 @@ Step 6
 
 .. code-block:: python3
 
-    root(solve_c, np.ones(S), args=(τ_star, u)).x
+    root(solve_c, np.ones(S), args=(τ_star, u)).x