rename disks to filesystems

src/df.js

@@ -1,7 +1,7 @@
 'use strict';
 
 exports = module.exports = {
-    disks,
+    filesystems,
     file,
     prettyBytes
 };
@@ -36,10 +36,10 @@ function parseLine(line) {
     };
 }
 
-async function disks() {
+async function filesystems() {
     const [error, output] = await safe(shell.spawn('df', ['-B1', '--output=source,fstype,size,used,avail,pcent,target'], { encoding: 'utf8', timeout: 5000 }));
     if (error) {
-        debug(`disks: df command failed. error: ${error}\n stdout: ${error.stdout}\n stderr: ${error.stderr}`);
+        debug(`filesystems: df command failed. error: ${error}\n stdout: ${error.stdout}\n stderr: ${error.stderr}`);
         throw new BoxError(BoxError.FS_ERROR, `Error running df: ${error.message}`);
     }