Merge identical conditions in init

src/content.js

@@ -553,6 +553,11 @@ function init() {
 
 			if (pageDetect.isPR() || pageDetect.isIssue()) {
 				linkifyIssuesInTitles();
+
+				markUnread.setup();
+
+				addOPLabels();
+				new MutationObserver(addOPLabels).observe(select('.new-discussion-timeline'), {childList: true, subtree: true});
 			}
 
 			if (pageDetect.isRepoRoot() || pageDetect.isRepoTree()) {
@@ -574,6 +579,7 @@ function init() {
 				if (diffElements) {
 					new MutationObserver(removeDiffSigns).observe(diffElements, {childList: true, subtree: true});
 				}
+				addDiffViewWithoutWhitespaceOption();
 			}
 
 			if (pageDetect.isPR() || pageDetect.isIssue() || pageDetect.isCommit()) {
@@ -582,10 +588,6 @@ function init() {
 				showRealNames();
 			}
 
-			if (pageDetect.hasDiff()) {
-				addDiffViewWithoutWhitespaceOption();
-			}
-
 			if (pageDetect.isCommitList()) {
 				markMergeCommitsInList();
 			}
@@ -600,16 +602,6 @@ function init() {
 				enableCopyOnY.setup();
 			}
 
-			if (pageDetect.isPR() || pageDetect.isIssue()) {
-				markUnread.setup();
-			}
-
-			if (pageDetect.isIssue() || pageDetect.isPR()) {
-				addOPLabels();
-
-				new MutationObserver(addOPLabels).observe(select('.new-discussion-timeline'), {childList: true, subtree: true});
-			}
-
 			if (pageDetect.isMilestone()) {
 				addMilestoneNavigation();
 			}