batch 3 - update Python idiom to 3.7 using pyupgrade (#11343)

* batch 3 - update Python idiom to 3.7 using pyupgrade

* add changelog frag

* bring back sanity

* adjust test

* Apply suggestions from code review

plugins/modules/htpasswd.py

@@ -204,7 +204,7 @@ def main():
     # TODO double check if this hack below is still needed.
     # Check file for blank lines in effort to avoid "need more than 1 value to unpack" error.
     try:
-        with open(path, "r") as f:
+        with open(path) as f:
             lines = f.readlines()
 
         # If the file gets edited, it returns true, so only edit the file if it has blank lines
@@ -222,7 +222,7 @@ def main():
             with open(path, "w") as f:
                 f.writelines(line for line in lines if line.strip())
 
-    except IOError:
+    except OSError:
         # No preexisting file to remove blank lines from
         pass