Reuse l10n strings instead of duplicating them

src/views/preview/comment/compose-comment.jsx

@@ -239,7 +239,7 @@ class ComposeComment extends React.Component {
                 commentType: justMuted ? 'comment.type.unconstructive' : 'comment.type.unconstructive.past',
                 muteStepHeader: 'comment.unconstructive.header',
                 muteStepContent: [
-                    justMuted ? 'comment.unconstructive.content1' : 'comment.unconstructive.content1.past',
+                    justMuted ? 'comment.unconstructive.content1' : 'comment.type.unconstructive.past',
                     'comment.unconstructive.content2'
                 ]
             },
@@ -248,7 +248,7 @@ class ComposeComment extends React.Component {
                 commentType: justMuted ? 'comment.type.vulgarity' : 'comment.type.vulgarity.past',
                 muteStepHeader: 'comment.vulgarity.header',
                 muteStepContent: [
-                    justMuted ? 'comment.vulgarity.content1' : 'comment.vulgarity.content1.past',
+                    justMuted ? 'comment.vulgarity.content1' : 'comment.type.vulgarity.past',
                     'comment.vulgarity.content2'
                 ]
             },

src/views/preview/l10n.json

@@ -60,13 +60,11 @@
     "comment.type.unconstructive.past": "It appears that one of your recent comments was saying something that might have been hurtful.",
     "comment.unconstructive.header": "We encourage you to be supportive when commenting on other people’s projects",
     "comment.unconstructive.content1": "It appears that your comment was saying something that might have been hurtful.",
-    "comment.unconstructive.content1.past": "It appears that one of your recent comments was saying something that might have been hurtful.",
     "comment.unconstructive.content2": "If you think something could be better, you can say something you like about the project, and make a suggestion about how to improve it.",
     "comment.type.vulgarity": "Your most recent comment appeared to include a bad word.",
     "comment.type.vulgarity.past": "It appears that one of your recent comments contained a bad word.",
     "comment.vulgarity.header": "We encourage you to use language that’s appropriate for all ages.",
     "comment.vulgarity.content1": "It appears that your comment contains a bad word.",
-    "comment.vulgarity.content1.past": "It appears that one of your recent comments contained a bad word.",
     "comment.vulgarity.content2": "Scratch has users of all ages, so it’s important to use language that is appropriate for all Scratchers.",
     "comment.type.spam": "Your most recent comment appeared to contain advertising, text art, or a chain message.",
     "comment.type.spam.past": "It appears that one of your recent comments contained advertising, text art, or a chain message.",

test/unit/components/compose-comment.test.jsx

@@ -571,7 +571,7 @@ describe('Compose Comment test', () => {
 
         commentInstance.setState({muteType: 'vulgarity'});
         expect(commentInstance.getMuteMessageInfo(false).commentType).toBe('comment.type.vulgarity.past');
-        expect(commentInstance.getMuteMessageInfo(false).muteStepContent[0]).toBe('comment.vulgarity.content1.past');
+        expect(commentInstance.getMuteMessageInfo(false).muteStepContent[0]).toBe('comment.type.vulgarity.past');
     });
 
     test('getMuteMessageInfo: muteType not set and just got muted', () => {