Address feedback

- Mention test filtering
- Remove restriction that `NAME` be a valid identifier
- Rename IDENT to NAME

Author: casey

text/0000-doctest-name.md

@@ -18,7 +18,8 @@ doctests, it is hard to identify which doctest is which in the test runner
 output by line number alone.
 
 By giving users the option to give names to doctests, identifying individual
-doctests in test runner output will be easier.
+doctests in test runner output will be easier. Additionally, users could re-run
+specific tests using `cargo test --doc -- $TEST_NAME`.
 
 # Guide-level explanation
 [guide-level-explanation]: #guide-level-explanation
@@ -53,7 +54,6 @@ test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
 If you'd like to have the test runner print a more informative name, perhaps
 because there are many doctests in a single file, you can put `name=NAME`,
 where `NAME` is the name the test should have, in the doctest's info string.
-`NAME` should be a valid Rust identifer.
 
 
 ````rust
@@ -77,18 +77,18 @@ test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
 [reference-level-explanation]: #reference-level-explanation
 
 The set of valid words that may appear in code block info strings is extended
-to include patterns of the form `name=IDENT`.
+to include patterns of the form `name=NAME`.
 
-This `IDENT` will be the name of the documentation test generated by the code
+This `NAME` will be the name of the documentation test generated by the code
 block.
 
 When the test runner runs the documentation test, the test will be identified
 by this name, in addition to the test binary, module, and line number.
 
-Multiple `name=IDENT` words may not appear in a single code block's info
+Multiple `name=NAME` words may not appear in a single code block's info
 string.
 
-`name=IDENT` may be combined with existing annotations like `rust` or
+`name=NAME` may be combined with existing annotations like `rust` or
 `should_panic` by separating the annotations with commas:
 
 ````
@@ -129,7 +129,8 @@ little hard to make sense of.
 # Prior art
 [prior-art]: #prior-art
 
-None.
+Unit and integration tests have names. This change would bring doctests closer
+to parity, by allowing features like test filtering to work with doctests.
 
 # Unresolved questions
 [unresolved-questions]: #unresolved-questions