Syntax overhaul before 1.0 release

[sleipi]

Syntax Overhaul before 1.0

Breaking changes to be implemented before the 1.0 release. Acceptable since we are pre-1.0.

Changes

#	Change	Breaking?	Effort
1	# lines in body are comments (not expected output). To test stdout starting with #, use [asserts] with line N startsWith "#"	Yes, minor	Parser
2	Section headers lowercase: [asserts], [captures], [finally], [prompts]	Yes	Parser + all tests/examples
3	Move later to front: later stdout contains "done" instead of stdout contains later "done"	Yes	Parser + assert evaluation
4	Capture syntax: id = stdout instead of id: stdout	Yes	Parser + tests
5	Remove [Options] section from SPEC (never implemented, directives cover everything)	No	Docs only
6	Bare-value semantics: everything after the predicate is the value (including spaces, quotes optional)	Potentially	Parser (value parsing)

Open Decision

• Section headers: accept only lowercase vs. parse case-insensitively?

Context

• Splitting EXIT NEVER into its own concept (vs. exit code declaration) will be handled separately
• Emerged from a brainstorm session on syntax cleanup before 1.0