I'm trying to view and edit a file in Vim, but this file has ANSI escape codes:
^[[1m[0.05s elapsed, 00:00:13 total]^[[0m
How can I tell Vim to interpret them properly instead of just showing the raw code?
It sounds like you want to display ANSI colors and conceal their escape characters. You can do this with Charles Campbell's "AnsiEsc" plugin.
Note that you will need Vim version 7.3 or newer. (Older versions of Vim could be patched, but that's more work for an outdated version of Vim.)
On Unix-like systems, vim uses those same escape sequences to move its cursor around and perform syntax highlighting. Interpreting such sequences in the data would interfere with editing.
Consider, you press arrow down, vim scrolls a new line into the bottom line, that line ends with a clear-screen sequence.