minor: Update commit/PR style guide
What matters for the changelog is having PR title/description from the user's perspective, while commits can be internal.
fix(ide-db): correct single-file module rename
Fixes a bug where rust-analyzer would emit `WorkspaceEdit`s with paths to dirs instead of files for the following project layout.
lib.rs
```rust
mod foo;
```
foo.rs
```rust
mod bar {
struct Bar;
}
```
Also fixes emitted paths for modules with mod.rs.
The bug resulted in panic in helix editor when attempting to rename a module.
fix: Retrigger visibility completion after parentheses
close#12390
This PR add `(` to trigger_characters as discussed in original issue.
Some questions:
1. Is lsp's `ctx.trigger_character` from `params.context` is the same as `ctx.original_token` inside actually completions?
1. If not what's the difference?
2. if they are the same, it's unnecessary to pass it down from handler at all.
3. if they are the same, maybe we could parse it from fixture directly instead of using the `check_with_trigger_character` I added.
2. Some completion fixtures written as `($0)` ( https://github.com/rust-lang/rust-analyzer/blob/master/crates/ide-completion/src/tests/fn_param.rs#L105 as an example), If I understand correctly they are not invoked outside tests at all?
1. using `ctx.original_token` directly would break these tests as well as parsing trigger_character from fixture for now.
2. I think it make sense to allow `(` triggering these cases?
3. I hope this line up with #12144
fix overflow during type inference for tuple struct patterns
The following code causes integer overflow during type inference for (malformed) tuple struct patterns.
```rust
struct S(usize);
let S(.., a, b) = S(1);
```
It has been panicking only in debug builds, and working in a way in release builds but it was inconsistent with type inference for tuple patterns:
```rust
struct S(usize);
let S(.., a, b) = S(1); // a -> unknown, b -> usize
let (.., a, b) = (1,); // a -> usize, b -> unknown
```
With this PR, the overflow no longer happens by utilizing `saturating_sub()` like in other places and type inference for tuple struct patterns is in line with that for tuple patterns.
make `files.excludeDirs` work
There's a small issue because if all projects are excluded, this: 01d412f4d7/crates/rust-analyzer/src/main_loop.rs (L114) will be shown.
I thought about not showing it if `files.excludeDirs` is set, but that is not necessarily correct.
Fixes#7755
