Use strconv instead of fmt in values' String funcs

The existing implementation of flag values with fmt package uses
more memory and works slower than the implementation with strconv
package.

1 files changed, 1 insertions, 3 deletions

diff --git a/string.go b/string.go
index e296136..04e0a26 100644
--- a/string.go
+++ b/string.go
@@ -1,7 +1,5 @@
 package pflag
 
-import "fmt"
-
 // -- string Value
 type stringValue string
 
@@ -18,7 +16,7 @@ func (s *stringValue) Type() string {
 	return "string"
 }
 
-func (s *stringValue) String() string { return fmt.Sprintf("%s", *s) }
+func (s *stringValue) String() string { return string(*s) }
 
 func stringConv(sval string) (interface{}, error) {
 	return sval, nil