refactor(pylint): _comp_cmd_pylint__message_ids main cmd convention

Author: scop

completions/pylint

@@ -10,10 +10,10 @@ _comp_cmd_pylint__message_ids()
     #   again later?
     local msgs="$(
         set -o pipefail
-        ${1:-pylint} --list-msgs-enabled 2>/dev/null |
+        "$1" --list-msgs-enabled 2>/dev/null |
             command sed -ne "$filter" |
             command sed -ne 's/^[[:space:]]\{1,\}\([a-z-]\{6,\}\).*/\1/p' ||
-            ${1:-pylint} --list-msgs 2>/dev/null |
+            "$1" --list-msgs 2>/dev/null |
             command sed -ne 's/^:\([a-z-]\{6,\}\).*/\1/p'
     )"
     _comp_delimited , -W "$msgs"