webpack gulp UglifyJsPlugin error.

[hetz]

when I use gulp-uglify, get this message: Unexpected character '`''

I find my fileName: '/Users/htz/WebstormProjects/wt-mobile/www-prod/view/m/static/dist/m-build.js',goto lineNumber: 56315,
that look like require include exGantt.md ?

/* 227 */
/***/ function(module, exports) {

	```
	gantt
	    dateFormat yyyy-mm-dd
	    title Adding gantt diagram functionality to mermaid

so when I remove change /mermaid/src/d3.js

if (require) {

everythiny is finel.

{ Error
at new JS_Parse_Error (eval at (/Users/htz/WebstormProjects/wt-mobile/node_modules/gulp-uglify/node_modules/uglify-js/tools/node.js:1:0), :1534:18)
at js_error (eval at (/Users/htz/WebstormProjects/wt-mobile/node_modules/gulp-uglify/node_modules/uglify-js/tools/node.js:1:0), :1542:11)
at parse_error (eval at (/Users/htz/WebstormProjects/wt-mobile/node_modules/gulp-uglify/node_modules/uglify-js/tools/node.js:1:0), :1667:9)
message: '/Users/htz/WebstormProjects/wt-mobile/www-prod/view/m/static/dist/m-build.js: Unexpected character '`'',
fileName: '/Users/htz/WebstormProjects/wt-mobile/www-prod/view/m/static/dist/m-build.js',
lineNumber: 56315,
stack: 'Error\n at new JS_Parse_Error (eval at (/Users/htz/WebstormProjects/wt-mobile/node_modules/gulp-uglify/node_modules/uglify-js/tools/node.js:1:0), :1534:18)\n at js_error (eval at (/Users/htz/WebstormProjects/wt-mobile/node_modules/gulp-uglify/node_modules/uglify-js/tools/node.js:1:0), :1542:11)\n at parse_error (eval at (/Users/htz/WebstormProjects/wt-mobile/node_modules/gulp-uglify/node_modules/uglify-js/tools/node.js:1:0), :1667:9)\n at Object.next_token [as input] (eval at (/Users/htz/WebstormProjects/wt-mobile/node_modules/gulp-uglify/node_modules/uglify-js/tools/node.js:1:0), :1946:9)\n at next (eval at (/Users/htz/WebstormProjects/wt-mobile/node_modules/gulp-uglify/node_modules/uglify-js/tools/node.js:1:0), :2075:25)\n at expect_token (eval at (/Users/htz/WebstormProjects/wt-mobile/node_modules/gulp-uglify/node_modules/uglify-js/tools/node.js:1:0), :2108:20)\n at expect (eval at (/Users/htz/WebstormProjects/wt-mobile/node_modules/gulp-uglify/node_modules/uglify-js/tools/node.js:1:0), :2113:36)\n at block_ (eval at (/Users/htz/WebstormProjects/wt-mobile/node_modules/gulp-uglify/node_modules/uglify-js/tools/node.js:1:0), :2425:9)\n at eval (eval at (/Users/htz/WebstormProjects/wt-mobile/node_modules/gulp-uglify/node_modules/uglify-js/tools/node.js:1:0), :2401:25)\n at function_ (eval at (/Users/htz/WebstormProjects/wt-mobile/node_modules/gulp-uglify/node_modules/uglify-js/tools/node.js:1:0), :2407:15)',
showStack: false,
showProperties: true,
plugin: 'gulp-uglify'
}