Merge pull request #3107 from NatLee/patch-1

[DOC] Miss underline before cmd in example code

Author: effigies

.zenodo.json

@@ -753,6 +753,10 @@
       "affiliation": "MIT, HMS",
       "name": "Ghosh, Satrajit",
       "orcid": "0000-0002-5312-6729"
+    },
+    {
+      "name": "Lee, Nat",
+      "orcid": "0000-0001-9308-9988"
     }
   ],
   "keywords": [

doc/devel/cmd_interface_devel.rst

@@ -149,7 +149,7 @@ Here is a minimalistic interface for the gzip command:
 	class GZipTask(CommandLine):
 	    input_spec = GZipInputSpec
 	    output_spec = GZipOutputSpec
-	    cmd = 'gzip'
+	    _cmd = 'gzip'
 
 	    def _list_outputs(self):
 	            outputs = self.output_spec().get()