3 files changed, 10 insertions, 9 deletions
diff --git a/contrib/devtools/copyright_header.py b/contrib/devtools/copyright_header.py
index c817e794b9..e7cccaab03 100755
--- a/contrib/devtools/copyright_header.py
+++ b/contrib/devtools/copyright_header.py
@@ -286,7 +286,7 @@ Arguments:
 def report_cmd(argv):
     if len(argv) == 2:
         sys.exit(REPORT_USAGE)
-        
+
     base_directory = argv[2]
     if not os.path.exists(base_directory):
         sys.exit("*** bad <base_directory>: %s" % base_directory)
@@ -444,7 +444,7 @@ def print_file_action_message(filename, action):
 def update_cmd(argv):
     if len(argv) != 3:
         sys.exit(UPDATE_USAGE)
-    
+
     base_directory = argv[2]
     if not os.path.exists(base_directory):
         sys.exit("*** bad base_directory: %s" % base_directory)
@@ -570,13 +570,13 @@ def insert_cmd(argv):
     _, extension = os.path.splitext(filename)
     if extension not in ['.h', '.cpp', '.cc', '.c', '.py']:
         sys.exit("*** cannot insert for file extension %s" % extension)
-   
+
     if extension == '.py': 
         style = 'python'
     else:
         style = 'cpp'
     exec_insert_header(filename, style)
-         
+
 ################################################################################
 # UI
 ################################################################################
diff --git a/contrib/devtools/github-merge.py b/contrib/devtools/github-merge.py
index 9c666673cf..187ef75fb7 100755
--- a/contrib/devtools/github-merge.py
+++ b/contrib/devtools/github-merge.py
@@ -21,7 +21,8 @@ import argparse
 import hashlib
 import subprocess
 import sys
-import json,codecs
+import json
+import codecs
 try:
     from urllib.request import Request,urlopen
 except:
diff --git a/contrib/devtools/optimize-pngs.py b/contrib/devtools/optimize-pngs.py
index 565b199125..a75731ef76 100755
--- a/contrib/devtools/optimize-pngs.py
+++ b/contrib/devtools/optimize-pngs.py
@@ -41,19 +41,19 @@ for folder in folders:
             file_path = os.path.join(absFolder, file)
             fileMetaMap = {'file' : file, 'osize': os.path.getsize(file_path), 'sha256Old' : file_hash(file_path)}
             fileMetaMap['contentHashPre'] = content_hash(file_path)
-        
+
             try:
                 subprocess.call([pngcrush, "-brute", "-ow", "-rem", "gAMA", "-rem", "cHRM", "-rem", "iCCP", "-rem", "sRGB", "-rem", "alla", "-rem", "text", file_path],
                                 stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
             except:
                 print("pngcrush is not installed, aborting...")
                 sys.exit(0)
-        
+
             #verify
             if "Not a PNG file" in subprocess.check_output([pngcrush, "-n", "-v", file_path], stderr=subprocess.STDOUT, universal_newlines=True):
                 print("PNG file "+file+" is corrupted after crushing, check out pngcursh version")
                 sys.exit(1)
-            
+
             fileMetaMap['sha256New'] = file_hash(file_path)
             fileMetaMap['contentHashPost'] = content_hash(file_path)
 
@@ -72,5 +72,5 @@ for fileDict in outputArray:
     totalSaveBytes += fileDict['osize'] - fileDict['psize']
     noHashChange = noHashChange and (oldHash == newHash)
     print(fileDict['file']+"\n  size diff from: "+str(fileDict['osize'])+" to: "+str(fileDict['psize'])+"\n  old sha256: "+oldHash+"\n  new sha256: "+newHash+"\n")
-    
+
 print("completed. Checksum stable: "+str(noHashChange)+". Total reduction: "+str(totalSaveBytes)+" bytes")