Internal Xcode install instruction

Reviewed By: elboman

Differential Revision: D51257660

fbshipit-source-id: 6cf213135f1070def3e62e936d6147b15749b7de

desktop/doctor/src/index.tsx

@@ -148,7 +148,7 @@ export function getHealthchecks(): FlipperDoctor.Healthchecks {
                 run: async (e: FlipperDoctor.EnvironmentInfo) => {
                   const hasProblem = e.IDEs == null || e.IDEs.Xcode == null;
                   const message = hasProblem
-                    ? `Xcode is not installed. ${installXcode}.`
+                    ? `Xcode is not installed.\n${installXcode}.`
                     : `Xcode version ${e.IDEs.Xcode.version} is installed at "${e.IDEs.Xcode.path}".`;
                   return {
                     hasProblem,

desktop/flipper-ui-core/src/sandy-chrome/SetupDoctorScreen.tsx

@@ -133,7 +133,11 @@ function CollapsableCategory(props: {
           key={check.key}
           header={check.label}
           extra={<CheckIcon status={check.result.status} />}>
-          <Paragraph>{check.result.message}</Paragraph>
+          {check.result.message?.split('\n').map((line, index) => (
+            <Paragraph key={index} style={{marginBottom: 0}}>
+              {line}
+            </Paragraph>
+          ))}
           {check.result.commands && (
             <List>
               {check.result.commands.map(({title, command}, i) => (