It can encounter a weird segfault on OS X with sqlite when Qt is present (?!)
The main reason to use the fork was to get the port number,
but this is easy now that notebooks write a server-info file.
Further advantage is that the symptom of a failed server start
is no longer silence and hanging tests, but an actual failure with the server's log output.
Don't autoclose strings, because CodeMirror's behavior makes it confusing and awkward to type triple-quoted strings (and these are very common in Python).
An issue about this was filed in CodeMirror itself: https://github.com/marijnh/CodeMirror/issues/2385
up arrow at the top line first goes to char 0, and only goes to the cell
above if already on char 0. Same with down arrow on the bottom line:
transition cursor to the end of the line, and only go down a cell if
already at the end of the last line.
this makes for an unhappy experience in code-mirror's vim mode for j
and k keys, but we'll fix that in the next commit
Sets the cursor on the last line of the cell when moved up from the top
of the cell below, and sets the cursors to the first line when moving
down from the bottom of a last line.
Here, we retain the character that the cursor was on, so that users
wishing to have up-down functionality like one document can still use
this shortcut handler and simple adjust the at_top and at_bottom methods
`pre`, `code` tags already set the font-family in these contexts.
Setting it again in the surrounding context is redundant,
and causes inconsistency when embedding notebooks in HTML
(e.g. nbviewer).