move dio widget to match new layout

contrib/README.md

@@ -60,11 +60,15 @@ Supported platforms: Linux (required tools: `sysfs`)
 
 **vicious.contrib.countfiles**
 
-vicious.contrib.dio
-  - provides I/O statistics for requested storage devices
+**vicious.contrib.dio**
+
+Provides I/O statistics for requested storage devices
+
+- Arguments:
   - takes the disk as an argument, i.e. "sda" (or a specific
     partition, i.e. "sda/sda2")
-  - returns a table with string keys: {total_s}, {total_kb}, {total_mb},
+- Returns:
+  - a table with string keys: {total_s}, {total_kb}, {total_mb},
     {read_s}, {read_kb}, {read_mb}, {write_s}, {write_kb}, {write_mb}
     and {sched}
 

contrib/dio_linux.lua

@@ -14,7 +14,7 @@ local helpers = require("vicious.helpers")
 
 -- Disk I/O: provides I/O statistics for requested storage devices
 -- vicious.contrib.dio
-local dio = {}
+local dio_linux = {}
 
 
 -- Initialize function tables
@@ -70,4 +70,4 @@ local function worker(format, disk)
 end
 -- }}}
 
-return setmetatable(dio, { __call = function(_, ...) return worker(...) end })
+return setmetatable(dio_linux, { __call = function(_, ...) return worker(...) end })