Fix camel-cased endswith()

Author: JoshRosen

dev/run-tests.py

@@ -654,9 +654,9 @@ def main():
     run_apache_rat_checks()
 
     # style checks
-    if not changed_files or any(f.endsWith(".scala") for f in changed_files):
+    if not changed_files or any(f.endswith(".scala") for f in changed_files):
         run_scala_style_checks()
-    if not changed_files or any(f.endsWith(".py") for f in changed_files):
+    if not changed_files or any(f.endswith(".py") for f in changed_files):
         run_python_style_checks()
 
     # determine if docs were changed and if we're inside the amplab environment