Fix: Missing spaces in printed messages

Several messages are printed with the `print` method and the message
is split across two lines, i.e.:

 print('This is a message split'
       'across two source code lines')

Which causes the message to be printed as:

 This is a message splitacross two source code lines

Add a space at the end of the first line before the line break:

 print('This is a message split '
       'across two source code lines'

Also correct a minor spelling mistake.

Change-Id: Ib98d93fcfb98d78f48025fcc428b6661380cff79
diff --git a/subcmds/upload.py b/subcmds/upload.py
index e314032..48ee685 100644
--- a/subcmds/upload.py
+++ b/subcmds/upload.py
@@ -27,11 +27,11 @@
 
 def _ConfirmManyUploads(multiple_branches=False):
   if multiple_branches:
-    print('ATTENTION: One or more branches has an unusually high number'
+    print('ATTENTION: One or more branches has an unusually high number '
           'of commits.')
   else:
     print('ATTENTION: You are uploading an unusually high number of commits.')
-  print('YOU PROBABLY DO NOT MEAN TO DO THIS. (Did you rebase across'
+  print('YOU PROBABLY DO NOT MEAN TO DO THIS. (Did you rebase across '
         'branches?)')
   answer = raw_input("If you are sure you intend to do this, type 'yes': ").strip()
   return answer == "yes"