Apply rustfmt on workspace members

members/braces/src/lib.rs

members/builtins/src/conditionals.rs

members/builtins/src/echo.rs

members/builtins/src/test.rs

members/lexers/src/lib.rs

members/ranges/src/index.rs

members/ranges/src/lib.rs

members/ranges/src/select.rs

members/sys/src/sys/redox/mod.rs

members/sys/src/sys/unix/mod.rs

rustfmt.toml

src/lib/parser/loops.rs

src/lib/parser/loops/mod.rs

src/lib/parser/mod.rs

src/lib/parser/shell_expand/README.md

src/lib/parser/shell_expand/braces.rs