doc/go1.4.txt: useless change to tickle builders

Debugging the builders and need a commit to make them run.

R=adg
CC=golang-codereviews
https://golang.org/cl/149600043

doc/go1.4.txt

@@ -43,6 +43,6 @@ testing: add TestMain support (CL 148770043)
 text/scanner: add IsIdentRune field of Scanner. (CL 108030044)
 text/template: allow comparison of signed and unsigned integers (CL 149780043)
 time: use the micro symbol (µ (U+00B5)) to print microsecond duration (CL 105030046)
-encoding/asn1: optional elements with a default value will now only be omitted if they have that value (CL 86960045).
+encoding/asn1: optional elements with a default value will now only be omitted if they have that value (CL 86960045)
 
 go.sys subrepo created: http://golang.org/s/go1.4-syscall