Pre-compute String size after #chomp() if possible
#15153
+25
−7
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If a
Stringends with one of the newlines and already has its number of characters known, the returnedStringmust have 1 or 2 fewer characters thanself. This PR avoids the need to re-compute@lengthin the new string again if possible.This technique is also applicable to many more substring extraction methods in
String.