[DOCS] Fix 'make setup' instructions for a new beat (#24944)

* Remove trailing whitespace

* Fix 'make setup' instructions for a new beat

In "Fetching Dependencies and Setting up the Beat" the user is
instructed to run 'make setup' in the newly created beat directory.

Such command fails with error:

  make: *** No rule to make target 'setup'.  Stop.

The problem and its fix are mentioned on forum [0] and reported in
issue #24660.

[0] https://discuss.elastic.co/t/make-no-rule-to-make-target-setup-stop-custom-beat/229231

* Correct 'make setup' also in generated docs

CHANGELOG.next.asciidoc

@@ -239,6 +239,7 @@ https://github.com/elastic/beats/compare/v7.0.0-alpha2...master[Check the HEAD d
 - Fix ILM alias not being created if `setup.ilm.check_exists: false` and `setup.ilm.overwrite: true` has been configured. {pull}24480[24480]
 - Fix issue discovering docker containers and metadata after reconnections {pull}24318[24318]
 - Allow cgroup self-monitoring to see alternate `hostfs` paths {pull}24334[24334]
+- Fix 'make setup' instructions for a new beat {pull}24944[24944]
 
 *Auditbeat*
 

docs/devguide/newbeat.asciidoc

@@ -138,7 +138,7 @@ For the `github_name`, enter your github id. The `beat` and `beat_path` are set
 ---------
 Enter a project name [examplebeat]:  Countbeat
 Enter a github name [your-github-name]: {username}
-Enter a beat path [github.com/{username}/countbeat]: 
+Enter a beat path [github.com/{username}/countbeat]:
 Enter a full name [Firstname Lastname]: {Full Name}
 Enter the github.com/elastic/beats revision [master]:
 ---------
@@ -162,7 +162,7 @@ To fetch dependencies and set up the Beat, run:
 [source,shell]
 ---------
 cd ${GOPATH}/src/github.com/{user}/countbeat
-make setup
+make update
 ---------
 
 The Beat now contains the basic config file, `countbeat.yml`, and template files. The Beat is "complete" in the sense
@@ -340,7 +340,7 @@ countbeat:
 
  - `period`: Defines how often to send out events
 
-The config file is generated when you run `make setup` to <<setting-up-beat,set up the beat>>. The file contains
+The config file is generated when you run `make update` to <<setting-up-beat,set up the beat>>. The file contains
 basic configuration information. To add configuration options to your Beat, you need to update the Go structures in
 `config/config.go` and add the corresponding config options to `_meta/beat.yml`.
 

generator/_templates/beat/{beat}/README.md

@@ -16,7 +16,7 @@ To get running with {Beat} and also install the
 dependencies, run the following command:
 
 ```
-make setup
+make update
 ```
 
 It will create a clean git history for each major step. Note that you can always rewrite the history if you wish before pushing your changes.

generator/_templates/metricbeat/{beat}/README.md

@@ -8,7 +8,7 @@
 To get started run the following command. This command should only be run once.
 
 ```
-make setup
+make update
 ```
 
 It will ask you for the module and metricset name. Insert the name accordingly.

x-pack/osquerybeat/README.md

@@ -16,7 +16,7 @@ To get running with {Beat} and also install the
 dependencies, run the following command:
 
 ```
-make setup
+make update
 ```
 
 It will create a clean git history for each major step. Note that you can always rewrite the history if you wish before pushing your changes.