Make IO#set_encoding with binary external encoding use nil internal encoding
This was already the behavior when a single 'external:internal'
encoding specifier string was passed. This makes the behavior
consistent for the case where separate external and internal
encoding specifiers are provided.
While here, fix the IO#set_encoding method documentation to
state that either the first or second argument can be a string
with an encoding name, and describe the behavior when the
external encoding is binary.
Added by jeremyevans (Jeremy Evans) over 2 years ago
Make IO#set_encoding with binary external encoding use nil internal encoding
This was already the behavior when a single
'external:internal'encoding specifier string was passed. This makes the behavior
consistent for the case where separate external and internal
encoding specifiers are provided.
While here, fix the IO#set_encoding method documentation to
state that either the first or second argument can be a string
with an encoding name, and describe the behavior when the
external encoding is binary.
Fixes [Bug #18899]