fix some formatting in the components notebook

Author: mcflugen

lessons/landlab/landlab/05-components.a.ipynb

@@ -18,7 +18,8 @@
     "Component modeling is a bit like the potluck tradition: one can construct a complete simulation by assembling components to represent the different parts of the system to be modeled. In Landlab, a **component** is a semi-standardized Python *class* that represents a particular process or calculation. Components are not stand-alone programs, but rather are designed to be used within another Python program that creates an integrated model or workflow.\n",
     "\n",
     "<img src=\"./media/Eat_Alberta_Potluck.jpg\">\n",
-    "*Figure 1: A potluck meal (\"Eat Alberta Potluck\" from Wikimedia Commons).*\n"
+    "\n",
+    "*Figure 1: A potluck meal (\"Eat Alberta Potluck\" from Wikimedia Commons).*"
    ]
   },
   {
@@ -46,6 +47,7 @@
    },
    "source": [
     "<img src=\"./media/bijou_gully_infiltration.png\">\n",
+    "\n",
     "*Figure 3: cumulative infiltration water depth during a simulated five-minute heavy rainfall (from Landlab tutorial \"Green-Ampt infiltration and kinematic wave overland flow\")*\n",
     "\n",
     "The following code snippets illustrate how the components are imported...\n",