Remove trailing space characters (#1256)

Also add two newlines

(rebased from `aaronfranke/formatting`)

resolves #1220

Co-authored-by: Aaron Franke <arnfranke@yahoo.com>
diff --git a/devtools/licenseupdater.py b/devtools/licenseupdater.py
index 36bdb5c..d9b662e 100644
--- a/devtools/licenseupdater.py
+++ b/devtools/licenseupdater.py
@@ -20,7 +20,7 @@
       dry_run: if True, just print the path of the file that would be updated,
                but don't change it.
       show_diff: if True, print the path of the file that would be modified,
-                 as well as the change made to the file. 
+                 as well as the change made to the file.
     """
     with open(path, 'rt') as fin:
         original_text = fin.read().replace('\r\n','\n')
@@ -51,7 +51,7 @@
       dry_run: if True, just print the path of the file that would be updated,
                but don't change it.
       show_diff: if True, print the path of the file that would be modified,
-                 as well as the change made to the file. 
+                 as well as the change made to the file.
     """
     from devtools import antglob
     prune_dirs = antglob.prune_dirs + 'scons-local* ./build* ./libs ./dist'