Merge branch 'eslint-options' into 'pregmod-master'

ESLint configuration to enable "smart" modes

See merge request !5430

.eslintrc.json

@@ -33,7 +33,7 @@
 		"semi-style": "warn",
 		"block-spacing": ["warn", "always"],
 		"curly": ["warn", "all"],
-		"eqeqeq": "warn",
+		"eqeqeq": ["warn", "smart"],
 		"no-fallthrough": "error",
 		"space-before-function-paren": ["warn", {
 			"anonymous": "never",
@@ -42,6 +42,7 @@
 		}],
 		"template-curly-spacing": ["warn", "never"],
 		"no-trailing-spaces": "warn",
+		"no-mixed-spaces-and-tabs": ["warn", "smart-tabs"],
 		"no-unneeded-ternary": "warn",
 		"camelcase": "warn",
 		"padded-blocks": ["warn", "never"],
@@ -71,7 +72,7 @@
 		"no-var": "warn",
 		"spaced-comment": "warn",
 		"no-undef": "off",
-		"no-unused-vars": "error",
+		"no-unused-vars": ["error", {"args": "none"}],
 		"block-scoped-var": "error",
 		"dot-notation": "warn",
 		"eol-last": "warn",