[bug] fish shell completion throw error

[sunny0826]

@sunny0826 Tested and still having the issue.

Builded using a clean Linux env and a fresh fish installation:

`vscode@a71fb1df192a /w/kubecm (dependabot/go_modules/github.com/spf13/cobra-1.4.0)> ./kubecm math: Error: Unexpected tokenish/completions/kubecm.fish
'ompletion ended with directive: ShellCompDirectiveNoFileComp / 1'
^
math: Error: Unexpected token
'% 2'
^
test: Missing argument at index 2

~/.config/fish/completions/kubecm.fish (line 93):
if test $compErr -eq 1
^
in function '__kubecm_prepare_completions'
in command substitution

(Type 'help test' for related documentation)
math: Error: Unexpected token
'ompletion ended with directive: ShellCompDirectiveNoFileComp / 8'
^
math: Error: Unexpected token
'% 2'
^
math: Error: Unexpected token
'ompletion ended with directive: ShellCompDirectiveNoFileComp / 16'
^
math: Error: Unexpected token
'% 2'
^
test: Missing argument at index 2

~/.config/fish/completions/kubecm.fish (line 101):
if test $filefilter -eq 1; or test $dirfilter -eq 1
^
in function '__kubecm_prepare_completions'
in command substitution

(Type 'help test' for related documentation)
test: Missing argument at index 2

~/.config/fish/completions/kubecm.fish (line 101):
if test $filefilter -eq 1; or test $dirfilter -eq 1
^
in function '__kubecm_prepare_completions'
in command substitution

(Type 'help test' for related documentation)
math: Error: Unexpected token
'ompletion ended with directive: ShellCompDirectiveNoFileComp / 2'
^
math: Error: Unexpected token
'% 2'
^
math: Error: Unexpected token
'ompletion ended with directive: ShellCompDirectiveNoFileComp / 4'
^
math: Error: Unexpected token
'% 2'
^
test: Missing argument at index 2

~/.config/fish/completions/kubecm.fish (line 117):
if test $nospace -ne 0; or test $nofiles -eq 0
^
in function '__kubecm_prepare_completions'
in command substitution

(Type 'help test' for related documentation)
test: Missing argument at index 2

~/.config/fish/completions/kubecm.fish (line 117):
if test $nospace -ne 0; or test $nofiles -eq 0
^
in function '__kubecm_prepare_completions'
in command substitution

(Type 'help test' for related documentation)`

The same results using MacOs

Originally posted by @interpeix in #76 (comment)

[sunny0826]

@interpeix This issue has been fixed in 0.16.4, can you help to verify that I don't have a filsh environment locally?

[interpeix]

@sunny0826 awesome! Totally fixed, thanks for the support.