Fix typo in gn documentation

Also updates an improper usage in a BUILD.gn file.

R=dpranke
BUG=None

Change-Id: I2d7d96f29165442e8642991a6db942b17b6c5012
Reviewed-on: https://chromium-review.googlesource.com/1069745
Reviewed-by: David Turner <digit@chromium.org>
Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Commit-Queue: David Turner <digit@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#561031}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 524e60fb52e11d589f3a0cc9010e98080bf98e23

tools/gn/docs/reference.md

diff --git a/tools/gn/docs/reference.md b/tools/gn/docs/reference.md
index 5ac654f..a982120 100644
--- a/tools/gn/docs/reference.md
+++ b/tools/gn/docs/reference.md
@@ -2676,7 +2676,7 @@
 
     template("shared_library") {
       shared_library(shlib) {
-        forward_variables_from(invoker, [ "*" ])
+        forward_variables_from(invoker, "*")
         ...
       }
     }

tools/gn/function_template.cc

diff --git a/tools/gn/function_template.cc b/tools/gn/function_template.cc
index 36af071..f5ea7b8 100644
--- a/tools/gn/function_template.cc
+++ b/tools/gn/function_template.cc
@@ -90,7 +90,7 @@
 
     template("shared_library") {
       shared_library(shlib) {
-        forward_variables_from(invoker, [ "*" ])
+        forward_variables_from(invoker, "*")
         ...
       }
     }