[#1207] Fix codacy errors

src/jekyll/_posts/2014/jul/2014-07-13-basics.md

@@ -115,8 +115,8 @@ Then, in your script you get `$tag` environment variable,
 which will be set to `1.7`. Your script should change
 the version of the product to 1.7 and build it.
 
-This is how we do it in jcabi 
-[`rultor.yml`](https://github.com/jcabi/jcabi/blob/master/.rultor.yml). 
+This is how we do it in jcabi
+[`rultor.yml`](https://github.com/jcabi/jcabi/blob/master/.rultor.yml).
 For example:
 
 {% highlight yaml %}

src/jekyll/_posts/2014/jul/2014-07-13-reference.md

@@ -295,7 +295,7 @@ release:
     echo "packaging..."
 {% endhighlight %}
 
-`sensitive` option lists files that must not present in the branch after the release. 
+`sensitive` option lists files that must not present in the branch after the release.
 It is recommended to list your sensitive config files there.
 
 `pre` option if set to `false` will automatically mark the release in GitHub as "final."

src/main/java/com/rultor/agents/github/Understands.java

@@ -230,7 +230,7 @@ private static int seen(final XML xml) {
      */
     private static String rootCause(final Profile.ConfigException exception) {
         Throwable root = exception;
-        while (root.getCause() != root) {
+        while (!root.equals(root.getCause())) {
             root = root.getCause();
         }
         return root.getMessage();