fix: correct spelling mistakes of "seperate, intialise, pre-defined" (#14647)

fix spellings

**seperate -> separate**: found more occurrences, see
https://github.com/langchain-ai/langchain/pull/14602
**initialise -> intialize**: the latter is more common in the repo
**pre-defined > predefined**: adding a comma after a prefix is a
delicate matter, but this is a generally accepted word

also, another word that appears in the repo is "fs" (stands for
filesystem), e.g., in `libs/core/langchain_core/prompts/loading.py`
` """Unified method for loading a prompt from LangChainHub or local
fs."""`
Isn't "filesystem" better?

libs/community/langchain_community/document_loaders/gcs_file.py

@@ -58,7 +58,7 @@ class GCSFileLoader(BaseLoader):
                 "Please install it with `pip install google-cloud-storage`."
             )
 
-        # Initialise a client
+        # initialize a client
         storage_client = storage.Client(
             self.project_name, client_info=get_client_info("google-cloud-storage")
         )

libs/community/langchain_community/document_loaders/html_bs.py

@@ -18,7 +18,7 @@ class BSHTMLLoader(BaseLoader):
         bs_kwargs: Union[dict, None] = None,
         get_text_separator: str = "",
     ) -> None:
-        """Initialise with path, and optionally, file encoding to use, and any kwargs
+        """initialize with path, and optionally, file encoding to use, and any kwargs
         to pass to the BeautifulSoup object.
 
         Args:

libs/community/langchain_community/document_loaders/mhtml.py

@@ -19,7 +19,7 @@ class MHTMLLoader(BaseLoader):
         bs_kwargs: Union[dict, None] = None,
         get_text_separator: str = "",
     ) -> None:
-        """Initialise with path, and optionally, file encoding to use, and any kwargs
+        """initialize with path, and optionally, file encoding to use, and any kwargs
         to pass to the BeautifulSoup object.
 
         Args:

libs/community/langchain_community/document_loaders/rspace.py

@@ -66,7 +66,7 @@ class RSpaceLoader(BaseLoader):
 
         except Exception:
             raise Exception(
-                f"Unable to initialise client - is url {self.url} or "
+                f"Unable to initialize client - is url {self.url} or "
                 f"api key  correct?"
             )
 

libs/community/langchain_community/document_loaders/tencent_cos_file.py

@@ -34,7 +34,7 @@ class TencentCOSFileLoader(BaseLoader):
                 "Please install it with `pip install cos-python-sdk-v5`."
             )
 
-        # Initialise a client
+        # initialize a client
         client = CosS3Client(self.conf)
         with tempfile.TemporaryDirectory() as temp_dir:
             file_path = f"{temp_dir}/{self.bucket}/{self.key}"