fix completion installing command

yutaro1985 · yutaro1985 · commit eb2e3b77ea4c · 2023-06-30T06:10:10.000+09:00
Signed-off-by: Yutaro Suzuki &lt;yutaro.suzuki@cloudys.dev&gt;
diff --git a/cmd/completion/completion.go b/cmd/completion/completion.go
@@ -48,7 +48,7 @@ This depends on the bash-completion binary.  Example installation instructions:
     % terraform-doc completion zsh > "${fpath[1]}/_terraform-doc"
 
 # for fish users
-	$ terraform-doc completion fish | source
+	$ terraform-doc completion fish > ~/.config/fish/completions/terraform-docs.fish
 
 Additionally, you may want to output the completion to a file and source in your .bashrc
 Note for zsh users: [1] zsh completions are only supported in versions of zsh >= 5.2
diff --git a/docs/user-guide/installation.md b/docs/user-guide/installation.md
@@ -138,11 +138,17 @@ source <(terraform-docs completion bash)
 
 ### zsh
 
-```bash
+```zsh
 terraform-docs completion zsh > /usr/local/share/zsh/site-functions/_terraform-docs
 autoload -U compinit && compinit
 ```
 
+### fish
+
+```fish
+terraform-doc completion fish > ~/.config/fish/completions/terraform-docs.fish   
+```
+
 To make this change permanent, the above commands can be added to `~/.profile` file.
 
 [Chocolatey]: https://www.chocolatey.org
