fix minor typos (#5934)

HISTORY.md

@@ -113,7 +113,7 @@ dev
 **Dependencies**
 
 - Pinning for `chardet` and `idna` now uses major version instead of minor.
-  This hopefully reduces the need for releases everytime a dependency is updated.
+  This hopefully reduces the need for releases every time a dependency is updated.
 
 2.22.0 (2019-05-15)
 -------------------
@@ -468,7 +468,7 @@ Or, even better:
 
 -   Fixed regression from 2.12.2 where non-string types were rejected in
     the basic auth parameters. While support for this behaviour has been
-    readded, the behaviour is deprecated and will be removed in the
+    re-added, the behaviour is deprecated and will be removed in the
     future.
 
 2.12.3 (2016-12-01)
@@ -1707,7 +1707,7 @@ This is not a backwards compatible change.
     New Authentication Manager System
 
     :   -   Simpler Basic HTTP System
-        -   Supports all build-in urllib2 Auths
+        -   Supports all built-in urllib2 Auths
         -   Allows for custom Auth Handlers
 
 0.2.4 (2011-02-19)

docs/user/advanced.rst

@@ -446,7 +446,7 @@ argument.
     def print_url(r, *args, **kwargs):
         print(r.url)
 
-Your callback function must handle its own exceptions. Any unhandled exception wont be pass silently and thus should be handled by the code calling Requests.
+Your callback function must handle its own exceptions. Any unhandled exception won't be passed silently and thus should be handled by the code calling Requests.
 
 If the callback function returns a value, it is assumed that it is to
 replace the data that was passed in. If the function doesn't return

requests/utils.py

@@ -154,7 +154,7 @@ def super_len(o):
                 current_position = total_length
         else:
             if hasattr(o, 'seek') and total_length is None:
-                # StringIO and BytesIO have seek but no useable fileno
+                # StringIO and BytesIO have seek but no usable fileno
                 try:
                     # seek to end of file
                     o.seek(0, 2)