#14804: Remove [] around optional arguments with default values

Mostly just mechanical removal of []. In some rare cases I've pulled the
default value up into the argument list.
diff --git a/Doc/library/httplib.rst b/Doc/library/httplib.rst
index 0a6968f..1e37cdf 100644
--- a/Doc/library/httplib.rst
+++ b/Doc/library/httplib.rst
@@ -89,7 +89,7 @@
       *source_address* was added.
 
 
-.. class:: HTTPResponse(sock[, debuglevel=0][, strict=0])
+.. class:: HTTPResponse(sock, debuglevel=0, strict=0)
 
    Class whose instances are returned upon successful connection.  Not instantiated
    directly by user.