code review 3423043: fmt: add %U format for standard Unicode representation ...

src/pkg/fmt/doc.go

 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
 /*
         Package fmt implements formatted I/O with functions analogous
         to C's printf and scanf.  The format 'verbs' are derived from C's but
         are simpler.
 
         Printing:
 
         The verbs:
 
         General:
                 %v      the value in a default format.
                         when printing structs, the plus flag (%+v) adds field names
                 %#v     a Go-syntax representation of the value
                 %T      a Go-syntax representation of the type of the value
 
         Boolean:
                 %t      the word true or false
         Integer:
                 %b      base 2
                 %c      the character represented by the corresponding Unicode code point
                 %d      base 10
                 %o      base 8
                 %x      base 16, with lower-case letters for a-f
                 %X      base 16, with upper-case letters for A-F
-                %U    unicode format: U+1234; same as "U+%x" with 4 digits default

[rsc1, 2010/12/06 19:20:03]

likely bad spacing (tab vs space after %U)

+                %U      unicode format: U+1234; same as "U+%x" with 4 digits default
         Floating-point and complex constituents:
                 %e      scientific notation, e.g. -1234.456e+78
                 %E      scientific notation, e.g. -1234.456E+78
                 %f      decimal point but no exponent, e.g. 123.456
                 %g      whichever of %e or %f produces more compact output
                 %G      whichever of %E or %f produces more compact output
         String and slice of bytes:
                 %s      the uninterpreted bytes of the string or slice
                 %q      a double-quoted string safely escaped with Go syntax
                 %x      base 16 notation with two characters per byte
@@ skipping 114 matching lines @@
         Note: Fscan etc. can read one character (rune) past the
         input they return, which means that a loop calling a scan
         routine may skip some of the input.  This is usually a
         problem only when there is no space between input values.
         However, if the reader provided to Fscan implements UnreadRune,
         that method will be used to save the character and successive
         calls will not lose data.  To attach an UnreadRune method
         to a reader without that capability, use bufio.NewReader.
 */
 package fmt