doc: mention that GOPATH/bin should be in PATH
As noticed while mentoring at Gophercon, a common mistake for
beginners is that, after they install git-codereview, it's not
found by git because they haven't put GOPATH/bin in their
environment.
Change-Id: I885cee0f532a4069d1a17ea27365d54965ecca22
Reviewed-on: https://go-review.googlesource.com/c/go/+/187818
Reviewed-by: Katie Hockman <katie@golang.org>
diff --git a/doc/contribute.html b/doc/contribute.html
index 471eeef..14839a6 100644
--- a/doc/contribute.html
+++ b/doc/contribute.html
@@ -238,7 +238,8 @@
</pre>
<p>
-prints help text, not an error.
+prints help text, not an error. If it prints an error, make sure that $GOPATH/bin
+is in your $PATH.
</p>
<p>
