Improved readability of Docs (#12136)

Replace this entire comment with:
  - **Description:** a description of the change, 
 improved grammar and readability of DOCS
 
@hwchase17

README.md

@@ -93,7 +93,7 @@ Memory refers to persisting state between calls of a chain/agent. LangChain prov
 
 **🧐 Evaluation:**
 
-[BETA] Generative models are notoriously hard to evaluate with traditional metrics. One new way of evaluating them is using language models themselves to do the evaluation. LangChain provides some prompts/chains for assisting in this.
+[BETA] Generative models are notoriously hard to evaluate with traditional metrics. One new way of evaluating them is by using language models themselves to do the evaluation. LangChain provides some prompts/chains for assisting in this.
 
 For more information on these concepts, please see our [full documentation](https://python.langchain.com).
 

docs/docs/modules/data_connection/document_loaders/file_directory.mdx

@@ -127,9 +127,9 @@ len(docs)
 
 ## Auto-detect file encodings with TextLoader
 
-In this example we will see some strategies that can be useful when loading a big list of arbitrary files from a directory using the `TextLoader` class.
+In this example we will see some strategies that can be useful when loading a large list of arbitrary files from a directory using the `TextLoader` class.
 
-First to illustrate the problem, let's try to load multiple text with arbitrary encodings.
+First to illustrate the problem, let's try to load multiple texts with arbitrary encodings.
 
 
 ```python