chore(for editor): Add comments for Emacs major mode.

.ci/fvt_tests/http_server/src/http_server.app.src

@@ -1,3 +1,4 @@
+%% -*- mode: erlang -*-
 {application, http_server,
  [{description, "An OTP application"},
   {vsn, "0.1.0"},

apps/emqx/src/emqx.app.src

@@ -1,3 +1,4 @@
+%% -*- mode: erlang -*-
 {application, emqx,
  [{id, "emqx"},
   {description, "EMQ X Core"},

apps/emqx/test/emqx_plugins_SUITE_data/emqx_hocon_plugin/src/emqx_hocon_plugin.app.src

@@ -1,3 +1,4 @@
+%% -*- mode: erlang -*-
 {application, emqx_hocon_plugin,
  [{description, "An EMQ X plugin for hocon testcase"},
   {vsn, "0.1"},

apps/emqx/test/emqx_plugins_SUITE_data/emqx_mini_plugin/src/emqx_mini_plugin.app.src

@@ -1,3 +1,4 @@
+%% -*- mode: erlang -*-
 {application, emqx_mini_plugin,
  [{description, "An EMQ X plugin for testcase"},
   {vsn, "0.1"},

apps/emqx_authn/src/emqx_authn.app.src

@@ -1,3 +1,4 @@
+%% -*- mode: erlang -*-
 {application, emqx_authn,
  [{description, "EMQ X Authentication"},
   {vsn, "0.1.0"},

apps/emqx_authz/src/emqx_authz.app.src

@@ -1,3 +1,4 @@
+%% -*- mode: erlang -*-
 {application, emqx_authz,
  [{description, "An OTP application"},
   {vsn, "0.1.1"},

apps/emqx_auto_subscribe/src/emqx_auto_subscribe.app.src

@@ -1,3 +1,4 @@
+%% -*- mode: erlang -*-
 {application, emqx_auto_subscribe,
  [{description, "An OTP application"},
   {vsn, "0.1.0"},

apps/emqx_bridge/src/emqx_bridge.app.src

@@ -1,3 +1,4 @@
+%% -*- mode: erlang -*-
 {application, emqx_bridge,
  [{description, "An OTP application"},
   {vsn, "0.1.0"},

apps/emqx_connector/src/emqx_connector.app.src

@@ -1,3 +1,4 @@
+%% -*- mode: erlang -*-
 {application, emqx_connector,
  [{description, "An OTP application"},
   {vsn, "0.1.1"},

apps/emqx_dashboard/src/emqx_dashboard.app.src

@@ -1,3 +1,4 @@
+%% -*- mode: erlang -*-
 {application, emqx_dashboard,
  [{description, "EMQ X Web Dashboard"},
   {vsn, "5.0.0"}, % strict semver, bump manually!

apps/emqx_exhook/src/emqx_exhook.app.src

@@ -1,3 +1,4 @@
+%% -*- mode: erlang -*-
 {application, emqx_exhook,
  [{description, "EMQ X Extension for Hook"},
   {vsn, "5.0.0"},

apps/emqx_exhook/src/emqx_exhook.appup.src

@@ -1,4 +1,4 @@
-%% -*-: erlang -*-
+%% -*- mode: erlang -*-
 {VSN,
  [
     {<<".*">>, []}

apps/emqx_gateway/src/emqx_gateway.app.src

@@ -1,3 +1,4 @@
+%% -*- mode: erlang -*-
 {application, emqx_gateway,
  [{description, "The Gateway management application"},
   {vsn, "0.1.0"},

apps/emqx_machine/src/emqx_machine.app.src

@@ -1,3 +1,4 @@
+%% -*- mode: erlang -*-
 {application, emqx_machine,
  [{id, "emqx_machine"},
   {description, "The EMQ X Machine"},

apps/emqx_management/src/emqx_management.app.src

@@ -1,3 +1,4 @@
+%% -*- mode: erlang -*-
 {application, emqx_management,
  [{description, "EMQ X Management API and CLI"},
   {vsn, "5.0.0"}, % strict semver, bump manually!

apps/emqx_modules/src/emqx_modules.app.src

@@ -1,3 +1,4 @@
+%% -*- mode: erlang -*-
 {application, emqx_modules,
  [{description, "EMQ X Modules"},
   {vsn, "5.0.0"},

apps/emqx_plugin_libs/src/emqx_plugin_libs.app.src

@@ -1,3 +1,4 @@
+%% -*- mode: erlang -*-
 {application, emqx_plugin_libs,
  [{description, "EMQ X Plugin utility libs"},
   {vsn, "4.3.1"},

apps/emqx_prometheus/src/emqx_prometheus.app.src

@@ -1,3 +1,4 @@
+%% -*- mode: erlang -*-
 {application, emqx_prometheus,
  [{description, "Prometheus for EMQ X"},
   {vsn, "5.0.0"}, % strict semver, bump manually!

apps/emqx_resource/elvis.config

@@ -1,3 +1,4 @@
+%% -*- mode: erlang -*-
 [{elvis, [{config, [
 
 #{dirs => ["src"],

apps/emqx_resource/src/emqx_resource.app.src

@@ -1,3 +1,4 @@
+%% -*- mode: erlang -*-
 {application, emqx_resource,
  [{description, "An OTP application"},
   {vsn, "0.1.0"},

apps/emqx_retainer/src/emqx_retainer.app.src

@@ -1,3 +1,4 @@
+%% -*- mode: erlang -*-
 {application, emqx_retainer,
  [{description, "EMQ X Retainer"},
   {vsn, "5.0.0"}, % strict semver, bump manually!

apps/emqx_rule_actions/src/emqx_rule_actions.app.src

@@ -1,3 +1,4 @@
+%% -*- mode: erlang -*-
 {application, emqx_rule_actions,
  [{description, "Rule actions"},
   {vsn, "5.0.0"},

apps/emqx_rule_engine/src/emqx_rule_engine.app.src

@@ -1,3 +1,4 @@
+%% -*- mode: erlang -*-
 {application, emqx_rule_engine,
  [{description, "EMQ X Rule Engine"},
   {vsn, "5.0.0"}, % strict semver, bump manually!

apps/emqx_statsd/src/emqx_statsd.app.src

@@ -1,3 +1,4 @@
+%% -*- mode: erlang -*-
 {application, emqx_statsd,
  [{description, "An OTP application"},
   {vsn, "5.0.0"},

elvis.config

@@ -1,4 +1,4 @@
-%% -*-: erlang -*-
+%% -*- mode: erlang -*-
 [
  {
    elvis,