Match any characters in multi-revision comment matchers

Currently, the matcher `//[rev-foo,rev-bar]~` does not get selected by
the regex, nor does anything that includes whitespace

Change the regex matcher to be more flexible and capture anything within
the `[...]` brackets, and trim the result before testing.

src/tools/compiletest/src/errors.rs

@@ -118,14 +118,14 @@ fn parse_expected(
     //     //[rev1]~
     //     //[rev1,rev2]~^^
     static RE: Lazy<Regex> =
-        Lazy::new(|| Regex::new(r"//(?:\[(?P<revs>[\w,]+)])?~(?P<adjust>\||\^*)").unwrap());
+        Lazy::new(|| Regex::new(r"//(?:\[(?P<revs>.+)])?~(?P<adjust>\||\^*)").unwrap());
 
     let captures = RE.captures(line)?;
 
     match (test_revision, captures.name("revs")) {
         // Only error messages that contain our revision between the square brackets apply to us.
         (Some(test_revision), Some(revision_filters)) => {
-            if !revision_filters.as_str().split(',').any(|r| r == test_revision) {
+            if !revision_filters.as_str().split(',').map(str::trim).any(|r| r == test_revision) {
                 return None;
             }
         }