basic support for the hdfs dfs <command> when the command misses the dash

thefuck/rules/hadoop_dfs_missing_dash.py

@@ -0,0 +1,10 @@
+def match(command, settings):
+    return ('hdfs dfs' in command.script
+            and "this command begins with a dash." in command.stderr.lower())
+
+
+def get_new_command(command, settings):
+    data = command.script.split()
+    data[2] = '-' + data[2]
+    return ' '.join(data)
+