Fix M(). (#591)

* Fix M().

* Break long line.

* Fix the remaining M(...).

* Break long line.

plugins/modules/packaging/os/flatpak.py

@@ -36,7 +36,7 @@ module: flatpak
 short_description: Manage flatpaks
 description:
 - Allows users to add or remove flatpaks.
-- See the M(flatpak_remote) module for managing flatpak remotes.
+- See the M(community.general.flatpak_remote) module for managing flatpak remotes.
 author:
 - John Kwiatkoski (@JayKayy)
 - Alexander Bethke (@oolongbrothers)
@@ -77,7 +77,7 @@ options:
     - The flatpak remote (repository) to install the flatpak from.
     - By default, C(flathub) is assumed, but you do need to add the flathub flatpak_remote before
       you can use this.
-    - See the M(flatpak_remote) module for managing flatpak remotes.
+    - See the M(community.general.flatpak_remote) module for managing flatpak remotes.
     type: str
     default: flathub
   state:

plugins/modules/packaging/os/flatpak_remote.py

@@ -40,7 +40,7 @@ description:
   formats.
 - Currently, remote addition is only supported via I(flatpakrepo) file URLs.
 - Existing remotes will not be updated.
-- See the M(flatpak) module for managing flatpaks.
+- See the M(community.general.flatpak) module for managing flatpaks.
 author:
 - John Kwiatkoski (@JayKayy)
 - Alexander Bethke (@oolongbrothers)

plugins/modules/packaging/os/pulp_repo.py

@@ -28,7 +28,7 @@ options:
     type: str
   force_basic_auth:
     description:
-      - httplib2, the library used by the M(uri) module only sends
+      - httplib2, the library used by the M(ansible.builtin.uri) module only sends
         authentication information when a webservice responds to an initial
         request with a 401 status. Since some basic auth services do not
         properly send a 401, logins will fail. This option forces the sending of

plugins/modules/packaging/os/rhn_register.py

@@ -16,7 +16,7 @@ description:
 author:
 - James Laska (@jlaska)
 notes:
-    - This is for older Red Hat products. You probably want the M(redhat_subscription) module instead.
+    - This is for older Red Hat products. You probably want the M(community.general.redhat_subscription) module instead.
     - In order to register a system, C(rhnreg_ks) requires either a username and password, or an activationkey.
 requirements:
     - rhnreg_ks

plugins/modules/packaging/os/svr4pkg.py

@@ -40,7 +40,7 @@ options:
     description:
       - Specifies the location to install the package from. Required when C(state=present).
       - "Can be any path acceptable to the C(pkgadd) command's C(-d) option. e.g.: C(somefile.pkg), C(/dir/with/pkgs), C(http:/server/mypkgs.pkg)."
-      - If using a file or directory, they must already be accessible by the host. See the M(copy) module for a way to get them there.
+      - If using a file or directory, they must already be accessible by the host. See the M(ansible.builtin.copy) module for a way to get them there.
     type: str
   proxy:
     description: