gc: fix spelling of "GOEXPERIMENT" in a comment.

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/5323070

diff --git a/src/cmd/gc/lex.c b/src/cmd/gc/lex.c
index 86492a53bcac90f7250ba02c8050fd8d6919747d..7c770453864c6184d0c18144a515992c37d45e27 100644 (file)
--- a/src/cmd/gc/lex.c
+++ b/src/cmd/gc/lex.c
@@ -31,7 +31,7 @@ static int    getlinepragma(void);
 static char *goos, *goarch, *goroot;
 
 // Compiler experiments.
-// These are controlled by the GCEXPERIMENT environment
+// These are controlled by the GOEXPERIMENT environment
 // variable recorded when the compiler is built.
 static struct {
        char *name;