Add unspecified-encoding checker #3826 (#4753)

* Add unspecified-encoding checker #3826
This adds an unspecified-encoding checker that adds a warning
whenever open() is called without an explicit encoding argument.
This closes #3826

* Update tests to conform to unspecified-encoding
With addition of the unspecified-encoding checker calls of open()
need an encoding argument.
Where necessary this argument has been added, or the message has been
disabled.
This also includes small linting changes to a small number
of tests. Their test-data has been updated to reflect new line numbers.

* Update scripts to conform to unspecified-encoding
With addition of the unspecified-encoding checker calls of open()
need an encoding argument.
Where necessary this argument has been added.

* Update pylint to conform to unspecified-encoding
With addition of the unspecified-encoding checker calls of open()
need an encoding argument.
Where necessary this argument has been added.

Co-authored-by: Marc Mueller <30130371+cdce8p@users.noreply.github.com>
Co-authored-by: Marc Mueller <30130371+cdce8p@users.noreply.github.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/script/fix_documentation.py b/script/fix_documentation.py
index 242225381..b03f70ead 100644
--- a/script/fix_documentation.py
+++ b/script/fix_documentation.py
@@ -82,7 +82,7 @@ def main(argv: Union[List[str], None] = None) -> int:
 
     return_value: int = 0
     for file_name in args.filenames:
-        with open(file_name) as fp:
+        with open(file_name, encoding="utf-8") as fp:
             orignal_content = fp.read()
         content = orignal_content
         # Modify files
@@ -91,7 +91,7 @@ def main(argv: Union[List[str], None] = None) -> int:
             content = changelog_insert_empty_lines(content, args.subtitle_prefix)
         # If modified, write changes and eventually return 1
         if orignal_content != content:
-            with open(file_name, "w") as fp:
+            with open(file_name, "w", encoding="utf-8") as fp:
                 fp.write(content)
             return_value |= 1
     return return_value