Completion is sometimes too eager / zealous

[dpercy]

When a local variable name is a substring of a top-level variable, the completion menu pops up and tries to complete the local variable (which I wanted to type) into the global variable (which I didn't).

Example: I'm defining a very small function, so the argument name is one letter:

I want to type x <Enter> to insert the local variable and go to a new line. Instead, when I type x the completion menu pops up:

and then pressing <Enter> accepts the completion:

Usually when this happens it's because the local variable is one letter, but it can also happen with multi-letter variable names:

It's possible to work around this by hitting <Esc> before <Enter>, but it's still frustrating because my muscle memory is expecting behavior closer to ghci or a plain text editor.

Some ideas for a solution:

1. Don't allow pressing <Enter> to accept a completion, since you can still use <Tab>.
2. Don't automatically pop up the menu, since you can still use <Ctrl-Space>.
3. Make idea 1 or idea 2 (or both) available as a configuration option.

[lierdakil]

autocomplete-haskell uses autocomplete-plus as a frontend. You can configure autocomplete-plus for both (1) and (2), so please see its settings.

[dpercy]

Oh, perfect. Thank you!