Fix indent setting

Asciidoc requires single line comments to be at the start of the line
so do not want indent.

data/filetypes.asciidoc

@@ -21,7 +21,7 @@ comment_single=//
 # setting to false would generate this
 #	command_example();
 # This setting works only for single line comments
-#comment_use_indent=true
+comment_use_indent=false
 
 # context action command (please see Geany's main documentation for details)
 context_action_cmd=