Hanafi
The sources give no view for it here.
الخروج من الخلاف
هل يُستحب الخروج من الخلاف؟
Each school’s answer
In our wordsHanafi
Not stated in the sources
Maliki
Not stated in the sources
Shafi'i
الخروج من الخلاف مستحب، ذكره السيوطي من الشافعية
مستحبHanbali
Not stated in the sources
The texts
حُكْمُ مُرَاعَاةِ الْخِلاَفِ: ٢٢ - ذَكَرَ السُّيُوطِيُّ مِنَ الشَّافِعِيَّةِ أَنَّ الْخُرُوجَ مِنَ الْخِلاَفِ مُسْتَحَبٌّ.
«الموسوعة الفقهية الكويتية» (Kuwait) entry «اختلاف» vol. 2 p. 298
From the schools’ own books
Maliki
The sources give no view for it here.
Shafi'i
مستحبIts place in the school’s books is not linked yet.
Hanbali
The sources give no view for it here.
What is «in our words» is our standard wording; the books’ texts stay as they are.