Fix yaml errors in CI (#757)

Don't warn on document start (cleanup, no one is using this)

Remove a bunch of trailing spaces and fix some bad indentation in the
pt-PT file.

There are still a bunch of lines that are significantly too long, should
be multiline strings.

.yamllint

@@ -4,3 +4,4 @@ rules:
     line-length:
         level: warning
         max: 200
+    document-start: disable