Use another augmented assignment statement

[elfring]

:eyes: Some source code analysis tools can help to find opportunities for improving software components. :thought_balloon: I propose to increase the usage of augmented assignment statements accordingly.

diff --git a/tika/tika.py b/tika/tika.py
index 3e19b6c..8c0983d 100755
--- a/tika/tika.py
+++ b/tika/tika.py
@@ -771,7 +771,7 @@ def getRemoteFile(urlOrPath, destPath):
         return (urlOrPath, 'local')
     else:
         filename = toFilename(urlOrPath)
-        destPath = destPath + '/' + filename
+        destPath += '/' + filename
         log.info('Retrieving %s to %s.' % (urlOrPath, destPath))
         try:
             urlretrieve(urlOrPath, destPath)