Consistency tweak in g:potion_command
Keep this consistent with the previous chapter.
    
        | author | Jeffrey Chupp <jeff@semanticart.com> | 
    
        | date | Wed, 21 Dec 2016 20:46:48 -0500 | 
    
    
        | parents | 664378742a34 | 
    
        | children | 5e8125c4f47b | 
    
        | branches/tags | (none) | 
    
        | files | chapters/53.markdown | 
Changes
    
--- a/chapters/53.markdown	Wed Dec 21 12:33:52 2016 -0500
+++ b/chapters/53.markdown	Wed Dec 21 20:46:48 2016 -0500
@@ -155,7 +155,7 @@
 
     :::vim
     if !exists("g:potion_command")
-        let g:potion_command = "/Users/sjl/src/potion/potion"
+        let g:potion_command = "potion"
     endif
 
     function! PotionCompileAndRunFile()
@@ -221,7 +221,7 @@
 
     :::vim
     if !exists("g:potion_command")
-        let g:potion_command = "/Users/sjl/src/potion/potion"
+        let g:potion_command = "potion"
     endif
 
     nnoremap <buffer> <localleader>r