migration error message unhelpful when name contains _

[wcarmon]

Bug Description

If one of your migration file names contains _ (underscore),

sqlx migrate run produces this unhelpful error message:

error: while resolving migrations: invalid digit found in string

Minimal Reproduction

1. create file in any project with a postgres database $PROJECT_ROOT/migrations/000.crate_foo_table.sql
2. add any valid create table sql statement (failure happens before parsing this so it doesn't matter)
3. run sqlx migrate run
4. notice the same error message above

Info

Cargo.toml has:

sqlx = { version = "0.7.3", features = ["runtime-tokio", "chrono", "macros", "postgres"] }

• SQLx version: 0.7.3
• SQLx features enabled: "runtime-tokio", "chrono", "macros", "postgres"
• Database server and version: Postgres 16.1 (via docker image: postgres:16.1)
• Operating system: Linux Mint, uname -r = 5.15.0-82-generic
• rustc --version: rustc 1.78.0-nightly (1a648b397 2024-02-11)

Suggested fixes:

1. include the the failing string (in this case, the failing migration file name) (or maybe first 32 chars)
2. include the failing character (in this case it is _ meaning underscore)

[abonander]

Fixed by #3089