Fix some regex syntax warnings

Author: burner1024

msg2po/core.py

@@ -231,7 +231,7 @@ def get_enc(lang_path: str = "", file_path: str = ""):
     if filename in UTF_FILENAMES:
         encoding = "utf-8"
 
-    utf_name = re.compile(".*_ee\.tra$")
+    utf_name = re.compile(r".*_ee\.tra$")
     if utf_name.match(filename):
         encoding = "utf-8"
 

msg2po/dir2msgstr.py

@@ -62,7 +62,7 @@ def dir2msgstr(src_dir: str, po: POFile, po_path: str = "", overwrite: bool = Tr
         for dir_name, subdir_list, file_list in os.walk(".", topdown=False, followlinks=True):
             for file_name in file_list:
                 full_name = os.path.join(dir_name, file_name)
-                full_name = re.sub("^\./", "", full_name)  # remove trailing './'
+                full_name = re.sub(r"^\./", "", full_name)  # remove trailing './'
                 fext = get_ext(file_name)
                 if fext != extension:
                     continue