Adjusting matcher comments with one-line summaries

pkg/matcher/lib/src/numeric_matchers.dart

Index: pkg/matcher/lib/src/numeric_matchers.dart
diff --git a/pkg/matcher/lib/src/numeric_matchers.dart b/pkg/matcher/lib/src/numeric_matchers.dart
index ae0b0ad72af204b2b60e4bdeb36ef64deb36a1d4..03134ddd3440c97db57b35982330e74b03c78352 100644
--- a/pkg/matcher/lib/src/numeric_matchers.dart
+++ b/pkg/matcher/lib/src/numeric_matchers.dart
@@ -111,7 +111,9 @@ class _OrderingComparison extends Matcher {
 }
 
 /// Returns a matcher which matches if the match argument is within [delta]
-/// of some [value]; i.e. if the match argument is greater than
+/// of some [value].
+///
+/// In other words, this matches if the match argument is greater than
 /// than or equal [value]-[delta] and less than or equal to [value]+[delta].
 Matcher closeTo(num value, num delta) => new _IsCloseTo(value, delta);