fix: use split_whitespace() instead of replace(' ') in proc macros to…

[owjs3901]

… handle newlines in long type paths

PR Info

• Fix DeriveActiveModelEx (and other derive macros) producing compile_error!("unexpected token") when entity module names are long (~50+ characters)
• Replace .replace(' ', "") with .split_whitespace().collect() across all 11 occurrences in sea-orm-macros

Bug Fixes

• [ x ] proc_macro2::TokenStream::to_string() inserts \n (newlines) for line-wrapping when the output exceeds ~80 characters. The existing code used .replace(' ', "") to normalize the stringified type, but this only strips spaces — not newlines.

When entity paths like HasMany<super::estimate_user_checker_setting::Entity> are long enough to trigger line-wrapping, the extracted path retains an embedded \n:

As shown in the image, an error occurs when a module with a long name is used inside HasMany.

// Before (breaks on long paths)
.replace(' ', "")

// After (strips all whitespace including \n, \r, \t)
.split_whitespace().collect()

[tyt2y3]

Note to self: this might not be the best approach to detect Option<T>, worth investigating later.