csvpy: changed italics to code formatting

pages/common/csvpy.md

@@ -3,10 +3,10 @@
 > Loads a CSV file into a Python shell.
 > Included in csvkit.
 
-- Load a CSV file into a _CSVKitReader_ object:
+- Load a CSV file into a `CSVKitReader` object:
 
 `csvpy {{data.csv}}`
 
-- Load a CSV file into a _CSVKitDictReader_ object:
+- Load a CSV file into a `CSVKitDictReader` object:
 
 `csvpy --dict {{data.csv}}`