DEV: Fix failing test on CI due to whitespace differences

I could not replicate the failure locally, but it was consistently
failing on CI with:

```
  Assertion Failed: it should escape watched words

      Expected:  <img src="x">, Actual:  <img src="x">
```

This commit removes an extra space that was added originally, but I
don't think it is really needed after double checking how it displays in
the UI. The `x` icon and the word have sufficient spacing between them.
If we need to we can tweak it in css instead.

app/assets/javascripts/admin/templates/components/admin-watched-word.hbs

@@ -1 +1 @@
-{{xIcon}} {{watchedWord}}
+{{xIcon}}{{watchedWord}}

test/javascripts/acceptance/admin-watched-words-test.js.es6

@@ -34,7 +34,7 @@ QUnit.test("list words in groups", async assert => {
 
   assert.equal(
     $(find(".watched-words-list .watched-word")[2]).text(),
-    ' <img src="x">',
+    '<img src="x">',
     "it should escape watched words"
   );