René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Fix handling of double-column characters","articleBody":"This is probably an issue with curtsies, but until I'm sure I want to report it here first:\r\n\r\nSteps to reproduce: Enter something like `'間'.isalnum()`, then move the cursor back (left arrow key) such that `a` is the next character, and insert an `x`.\r\nExpected behavior: Visually it looks like we're about to insert an `x` between `is` and `alnum`.  So I would expect the line to say `isxalnum`.\r\nActual behavior: It now says `'間'.isaxlnum()`, with the next character seemingly being the `x`.\r\n\r\nTry this out with `y` instead of `間` to see the expected behavior.\r\n\r\nI may have broken this in the patch to #703, I'm not sure.\r\n\r\nThe pun (\"間\" meaning \"between\") is entirely coincidental, but I like it, and I'm keeping it.","author":{"url":"https://github.com/BenWiederhake","@type":"Person","name":"BenWiederhake"},"datePublished":"2018-09-14T15:31:31.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/749/bpython/issues/749"}