correct() updated to return None in case of correct word submit for test and str() for lack of suggestion, i.e. gibberish submit

Author: bugsyb

language_tool_python/utils.py

@@ -1,5 +1,3 @@
-"""Utility functions for the LanguageTool library."""
-
 from typing import List, Tuple, Optional
 from shutil import which
 
@@ -73,15 +71,6 @@ class PathError(LanguageToolError):
     pass
 
 
-class RateLimitError(LanguageToolError):
-    """
-    Exception raised for errors related to rate limiting in the LanguageTool server.
-    This exception is a subclass of `LanguageToolError` and is used to indicate
-    issues such as exceeding the allowed number of requests to the public API without a key.
-    """
-    pass
-
-
 def parse_url(url_str: str) -> str:
     """
     Parse the given URL string and ensure it has a scheme.
@@ -112,24 +101,26 @@ def correct(text: str, matches: List[Match]) -> str:
     :rtype: str
     """
     ltext = list(text)
-    matches = [match for match in matches if match.replacements]
-    if matches:
-        errors = [ltext[match.offset:match.offset + match.errorLength]
-                  for match in matches]
-        correct_offset = 0
-        for n, match in enumerate(matches):
-            frompos, topos = (correct_offset + match.offset,
-                              correct_offset + match.offset + match.errorLength)
-            if ltext[frompos:topos] != errors[n]:
-                continue
-            repl = match.replacements[0]
-            ltext[frompos:topos] = list(repl)
-            correct_offset += len(repl) - len(errors[n])
-        return ''.join(ltext)
+    if len(matches):
+        matches = [match for match in matches if match.replacements]
+        if matches:
+            errors = [ltext[match.offset:match.offset + match.errorLength]
+                      for match in matches]
+            correct_offset = 0
+            for n, match in enumerate(matches):
+                frompos, topos = (correct_offset + match.offset,
+                                  correct_offset + match.offset + match.errorLength)
+                if ltext[frompos:topos] != errors[n]:
+                    continue
+                repl = match.replacements[0]
+                ltext[frompos:topos] = list(repl)
+                correct_offset += len(repl) - len(errors[n])
+            return ''.join(ltext)
+        else:
+            return str()
     else:
         return None
 
-
 def get_language_tool_download_path() -> str:
     """
     Get the download path for LanguageTool.