Remove superfluous backslash in regexp example

marijnh · marijnh · commit fe39cebd91ee · 2018-03-15T16:10:29.000+01:00
Closes marijnh#403
diff --git a/09_regexp.md b/09_regexp.md
@@ -846,7 +846,7 @@ has a special meaning.
 ```
 let name = "dea+hl[]rd";
 let text = "This dea+hl[]rd guy is super annoying.";
-let escaped = name.replace(/[\\\[.+*?(){|^$]/g, "\\$&");
+let escaped = name.replace(/[\\[.+*?(){|^$]/g, "\\$&");
 let regexp = new RegExp("\\b" + escaped + "\\b", "gi");
 console.log(text.replace(regexp, "_$&_"));
 // → This _dea+hl[]rd_ guy is super annoying.
