New features

• Split commands over multiple lines, by escaping line breaks, or using line breaks after logical operators and within parentheses (George Brocklehurst)
• Split arguments over multiple lines, by using line breaks inside quoted strings (George Brocklehurst)
• Group commands with parentheses to override default operator precedence, e.g. (foo || bar) && baz (George Brocklehurst)
• Use :cd with no arguments to change to the repository's root directory (George Brocklehurst)
• New $_root magic variable, which evaluates to the repository's root directory (George Brocklehurst)
• Use Git options directly, e.g. you can now type --version to see the version of Git you're using (George Brocklehurst)

Bug fixes

• More robust subshell parsing, e.g. $(:echo ")") now works as expected (George Brocklehurst & Adam Sharp)
• Catch parse errors in subshells earlier (George Brocklehurst & Adam Sharp)
• Exit with a non-zero status when a non interactive session encounters a parse error (George Brocklehurst)

Internals

• Complete parser re-write, replacing a Parslet PEG with an RLTK CFG (George Brocklehurst)