Add optional comma to metadata

Cargo.lock

@@ -566,7 +566,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "snekdown"
-version = "0.15.1"
+version = "0.15.2"
 dependencies = [
  "chrono 0.4.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "colored 1.9.3 (registry+https://github.com/rust-lang/crates.io-index)",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "snekdown"
-version = "0.15.1"
+version = "0.15.2"
 authors = ["trivernis <trivernis@protonmail.com>"]
 edition = "2018"
 license-file = "LICENSE"

README.md

@@ -172,7 +172,7 @@ Bibliography entries can be defined and referenced anywhere in the document.
 
 Definition:
 ```md
-[book]:[author=Snek title = "Snekdown Book"]
+[book]:[author=Snek, title = "Snekdown Book"]
 [github]: https://github.com/trivernis/snekdown
 ```
 

src/parsing/parser.rs

@@ -454,6 +454,10 @@ impl Parser {
                 if self.check_special_group(&QUOTES) {
                     self.skip_char();
                 }
+                self.seek_inline_whitespace();
+                if self.check_special(&COMMA) {
+                    self.skip_char();
+                }
                 value = if quoted_string {
                     MetadataValue::String(raw_value)
                 } else if raw_value.to_lowercase().as_str() == "true" {

src/parsing/tokens.rs

@@ -31,6 +31,7 @@ pub(crate) const SEMICOLON: char = ';';
 pub(crate) const R_BRACE: char = '{';
 pub(crate) const L_BRACE: char = '}';
 pub(crate) const PERCENT: char = '%';
+pub(crate) const COMMA: char = ',';
 
 // aliases