Edit for spacing

doc/lua-filters.md

@@ -10,7 +10,7 @@ Create custom outputs with pandoc's embedded Lua engine.
 
 ## Introduction
 
-With Lua filters, you can write Pandoc filters  without any
+With Lua filters, you can write Pandoc filters without any
 external dependencies. Besides the simpler set-up, Lua filters are
 generally faster and can access utility functions to manipulate
 document elements. 
@@ -76,7 +76,6 @@ written in compiled Haskell (`smallcaps`) and interpreted Python
 As you can see, the Lua filter avoids the substantial overhead
 associated with marshaling to and from JSON over a pipe.
 
-
 # Lua filter structure
 
 Lua filters are tables with element names as keys and values