String: Fix documentation for getTrailingIntValue

modules/juce_core/text/juce_String.cpp

@@ -2577,6 +2577,8 @@ public:
             expect (String (std::numeric_limits<int64>::max()).getLargeIntValue() == std::numeric_limits<int64>::max());
             expect (String (std::numeric_limits<int64>::min()).getLargeIntValue() == std::numeric_limits<int64>::min());
             expect (("xyz" + s).getTrailingIntValue() == s.getIntValue());
+            expect (String ("xyz-5").getTrailingIntValue() == -5);
+            expect (String ("-12345").getTrailingIntValue() == -12345);
             expect (s.getHexValue32() == 0x12345678);
             expect (s.getHexValue64() == (int64) 0x12345678);
             expect (String::toHexString (0x1234abcd).equalsIgnoreCase ("1234abcd"));

modules/juce_core/text/juce_String.h

@@ -1049,7 +1049,8 @@ public:
         This will look for a value at the end of the string.
         e.g. for "321 xyz654" it will return 654; for "2 3 4" it'll return 4.
 
-        Negative numbers are not handled, so "xyz-5" returns 5.
+        If the string ends with a hyphen followed by numeric characters, the
+        return value will be negative.
 
         @see getIntValue
     */