1.0.57

• Disable nightly-only start()/end() implementation on Span while the upstream API is iterated on (#383, rust-lang/rust#111571)

1.0.56

• Circumvent clippy::octal_escapes lint inside generated string and byte-string literals (#363, #380)
• Provide RefUnwindSafe impls for compilers older than 1.58 (#382)

1.0.55

• Set a meaningful Span for literals produced via the FromStr impl of Literal (#378)
• Implement Literal::subspan in non-macro contexts when "span-locations" feature is enabled (#379)

1.0.54

• Performance improvement to "span-locations" feature (#373)
• Fix unbounded memory usage when calling proc-macro2's parser from a fuzzer (#374)

1.0.53

• Add support for Rust 1.66's source_text() method (#350)

1.0.52

• Add Group::delim_span (#366)

1.0.51

• Implement rustc's limit on the number of # used for delimiting a raw string literal: 255 (#364)

1.0.50

• Implement Hash for proc_macro2::LineColumn (#362)

1.0.49

• Opt out of -Zrustdoc-scrape-examples on docs.rs for now

1.0.48

• Documentation improvements