address lines_longer_than_80_chars lints

example/arg_parser/pubspec.yaml

diff --git a/example/arg_parser/pubspec.yaml b/example/arg_parser/pubspec.yaml
index 52f193a..9cb1cbd 100644
--- a/example/arg_parser/pubspec.yaml
+++ b/example/arg_parser/pubspec.yaml
@@ -6,8 +6,10 @@
 version: 1.0.0
 description: An example of using ArgParser
 publish_to: 'none'
+
 environment:
-  sdk: '>=2.14.0 <3.0.0'
+  sdk: ^3.0.0
+
 dependencies:
   args:
     path: ../..

lib/src/arg_parser.dart

diff --git a/lib/src/arg_parser.dart b/lib/src/arg_parser.dart
index 7bb21c7..573027f 100644
--- a/lib/src/arg_parser.dart
+++ b/lib/src/arg_parser.dart
@@ -119,9 +119,11 @@
   ///
   /// If [hide] is `true`, this option won't be included in [usage].
   ///
-  /// If [hideNegatedUsage] is `true`, the fact that this flag can be negated will
-  /// not be documented in [usage].
-  /// It is an error for [hideNegatedUsage] to be `true` if [negatable] is `false`.
+  /// If [hideNegatedUsage] is `true`, the fact that this flag can be negated
+  /// will not be documented in [usage].
+  ///
+  /// It is an error for [hideNegatedUsage] to be `true` if [negatable] is
+  /// `false`.
   ///
   /// If [aliases] is provided, these are used as aliases for [name]. These
   /// aliases will not appear as keys in the [options] map.
@@ -315,8 +317,7 @@
 
     if (!negatable && hideNegatedUsage) {
       throw ArgumentError(
-        'The option $name cannot have `hideNegatedUsage` without being negatable.',
-      );
+          'The option $name can only use hideNegatedUsage if it is negatable.');
     }
 
     var option = newOption(name, abbr, help, valueHelp, allowed, allowedHelp,

pubspec.yaml

diff --git a/pubspec.yaml b/pubspec.yaml
index 8222f41..fc4a35d 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,8 +1,8 @@
 name: args
 version: 2.6.0
 description: >-
-  Library for defining parsers for parsing raw command-line arguments into a set
-  of options and values using GNU and POSIX style options.
+  Library for defining parsers for parsing raw command-line arguments into a
+  set of options and values using GNU and POSIX style options.
 repository: https://github.com/dart-lang/args
 
 topics: