Rename "misc" command to "system", do not append completion code for Fish shell // Resolve 3435

platformio/commands/system/command.py

@@ -18,14 +18,14 @@ import subprocess
 import click
 
 from platformio import proc
-from platformio.commands.misc.completion import (
+from platformio.commands.system.completion import (
     get_completion_install_path,
     install_completion_code,
     uninstall_completion_code,
 )
 
 
-@click.group("misc", short_help="Miscellaneous commands")
+@click.group("system", short_help="Miscellaneous system commands")
 def cli():
     pass
 

platformio/commands/system/completion.py

@@ -52,7 +52,7 @@ def install_completion_code(shell, path):
     if is_completion_code_installed(shell, path):
         return None
 
-    return click_completion.install(shell=shell, path=path)
+    return click_completion.install(shell=shell, path=path, append=shell != "fish")
 
 
 def uninstall_completion_code(shell, path):

tox.ini

@@ -19,7 +19,7 @@ envlist = py27,py37,py38
 passenv = *
 usedevelop = True
 deps =
-    py36,py3,py38: black
+    py36,py37,py38: black
     isort
     pylint
     pytest