Open Radar

 
Summary:
NSString:localizedStringWithFormat: returns wrong string when formatter contains a "+".

Steps to Reproduce:
Print out a number with stringWithFormat and localizedStringWithFormat. 

Sample code:

#import <Foundation/Foundation.h>

int main(int argc, char *argv[]) {
	NSAutoreleasePool *p = [[NSAutoreleasePool alloc] init];
	float value = -1.0;
    NSString *s1 = [NSString stringWithFormat:@"%+.2f", value];
    NSString *s2 = [NSString localizedStringWithFormat:@"%+.2f", value];
    NSLog(@"stringWithFormat: %@", s1);
    NSLog(@"localizedStringWithFormat: %@", s2);
	[p release];
}

Expected Results:
Both log outputs should _not_ show a "+" in front of the number since it is negative (as specified in the "String Programming Guide" and "IEEE 1003.1")

Actual Results:
Output of the above code is:

2012-10-31 12:16:51.621 Untitled[65470:707] stringWithFormat: -1.00
2012-10-31 12:16:51.623 Untitled[65470:707] localizedStringWithFormat: -+1.00

(there's one extra "+" when using localizedStringWithFormat).

Regression:
n/a

Notes:
n/a