csh: Define `ECHO and COMMAND_SEP`

Fixes: #204

Signed-off-by: Abhijeet Kasurde <akasurde@redhat.com>

plugins/shell/csh.py

@@ -26,6 +26,10 @@ class ShellModule(ShellBase):
     # Family of shells this has.  Must match the filename without extension
     SHELL_FAMILY = 'csh'
 
+    # commonly used
+    ECHO = 'echo'
+    COMMAND_SEP = ';'
+
     # How to end lines in a python script one-liner
     _SHELL_EMBEDDED_PY_EOL = '\\\n'
     _SHELL_REDIRECT_ALLNULL = '>& /dev/null'