Use double quotes for URLs in cURL commands

doc/development/documentation/styleguide.md

@@ -1932,7 +1932,7 @@ METHOD /endpoint
 Example request:
 
 ```shell
-curl --header "PRIVATE-TOKEN: <your_access_token>" 'https://gitlab.example.com/api/v4/endpoint?parameters'
+curl --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/endpoint?parameters"
 ```
 
 Example response:
@@ -2027,7 +2027,7 @@ you can use in the API documentation.
 Get the details of a group:
 
 ```shell
-curl --header "PRIVATE-TOKEN: <your_access_token>" https://gitlab.example.com/api/v4/groups/gitlab-org
+curl --header "PRIVATE-TOKEN: <your_access_token>" "https://gitlab.example.com/api/v4/groups/gitlab-org"
 ```
 
 #### cURL example with parameters passed in the URL
@@ -2055,7 +2055,7 @@ In this example we create a new group. Watch carefully the single and double
 quotes.
 
 ```shell
-curl --request POST --header "PRIVATE-TOKEN: <your_access_token>" --header "Content-Type: application/json" --data '{"path": "my-group", "name": "My group"}' https://gitlab.example.com/api/v4/groups
+curl --request POST --header "PRIVATE-TOKEN: <your_access_token>" --header "Content-Type: application/json" --data '{"path": "my-group", "name": "My group"}' "https://gitlab.example.com/api/v4/groups"
 ```
 
 #### Post data using form-data
@@ -2064,7 +2064,7 @@ Instead of using JSON or urlencode you can use multipart/form-data which
 properly handles data encoding:
 
 ```shell
-curl --request POST --header "PRIVATE-TOKEN: <your_access_token>" --form "title=ssh-key" --form "key=ssh-rsa AAAAB3NzaC1yc2EA..." https://gitlab.example.com/api/v4/users/25/keys
+curl --request POST --header "PRIVATE-TOKEN: <your_access_token>" --form "title=ssh-key" --form "key=ssh-rsa AAAAB3NzaC1yc2EA..." "https://gitlab.example.com/api/v4/users/25/keys"
 ```
 
 The above example is run by and administrator and will add an SSH public key
@@ -2090,7 +2090,7 @@ exclude specific users when requesting a list of users for a project, you would
 do something like this:
 
 ```shell
-curl --request PUT --header "PRIVATE-TOKEN: <your_access_token>" --data "skip_users[]=<user_id>" --data "skip_users[]=<user_id>" https://gitlab.example.com/api/v4/projects/<project_id>/users
+curl --request PUT --header "PRIVATE-TOKEN: <your_access_token>" --data "skip_users[]=<user_id>" --data "skip_users[]=<user_id>" "https://gitlab.example.com/api/v4/projects/<project_id>/users"
 ```
 
 ## GraphQL API