Fixed #30573 -- Rephrased documentation to avoid words that minimise the involved difficulty.

This patch does not remove all occurrences of the words in question.
Rather, I went through all of the occurrences of the words listed
below, and judged if they a) suggested the reader had some kind of
knowledge/experience, and b) if they added anything of value (including
tone of voice, etc). I left most of the words alone. I looked at the
following words:

- simply/simple
- easy/easier/easiest
- obvious
- just
- merely
- straightforward
- ridiculous

Thanks to Carlton Gibson for guidance on how to approach this issue, and
to Tim Bell for providing the idea. But the enormous lion's share of
thanks go to Adam Johnson for his patient and helpful review.

docs/ref/files/uploads.txt

@@ -12,8 +12,8 @@ Uploaded files
 
 During file uploads, the actual file data is stored in :attr:`request.FILES
 <django.http.HttpRequest.FILES>`. Each entry in this dictionary is an
-``UploadedFile`` object (or a subclass) -- a simple wrapper around an uploaded
-file. You'll usually use one of these methods to access the uploaded content:
+``UploadedFile`` object (or a subclass) -- a wrapper around an uploaded file.
+You'll usually use one of these methods to access the uploaded content:
 
 .. method:: UploadedFile.read()
 
@@ -33,9 +33,9 @@ file. You'll usually use one of these methods to access the uploaded content:
     A generator returning chunks of the file. If ``multiple_chunks()`` is
     ``True``, you should use this method in a loop instead of ``read()``.
 
-    In practice, it's often easiest simply to use ``chunks()`` all the time.
-    Looping over ``chunks()`` instead of using ``read()`` ensures that large
-    files don't overwhelm your system's memory.
+    In practice, it's often easiest to use ``chunks()`` all the time. Looping
+    over ``chunks()`` instead of using ``read()`` ensures that large files
+    don't overwhelm your system's memory.
 
 Here are some useful attributes of ``UploadedFile``:
 
@@ -72,8 +72,8 @@ Here are some useful attributes of ``UploadedFile``:
 
 .. note::
 
-    Like regular Python files, you can read the file line-by-line simply by
-    iterating over the uploaded file:
+    Like regular Python files, you can read the file line-by-line by iterating
+    over the uploaded file:
 
     .. code-block:: python