javascript-api: Fix a case of trailing whitespace

_i18n/en/_docs/javascript-api.md

@@ -293,7 +293,7 @@ Clone **[this repo](https://github.com/oleavr/frida-agent-example)** to get star
     rely on debugger-friendly binaries or presence of debug information to do a
     good job, whereas the fuzzy backtracers perform forensics on the stack in
     order to guess the return addresses, which means you will get false
-    positives, but it will work on any binary. The generated backtrace is 
+    positives, but it will work on any binary. The generated backtrace is
     currently limited to 16 frames and is not adjustable without recompiling
     Frida.