From 4bf411ea6d8e348accfa66b86e18395af2038fe9 Mon Sep 17 00:00:00 2001
From: Eric Huss <eric@huss.org>
Date: Sun, 29 Sep 2019 18:17:48 -0700
Subject: [PATCH] Update built-in help for --extern.

---
 src/librustc/session/config.rs | 2 +-
 src/librustdoc/lib.rs          | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/librustc/session/config.rs b/src/librustc/session/config.rs
index 1740d8fe96751..b1284280f8791 100644
--- a/src/librustc/session/config.rs
+++ b/src/librustc/session/config.rs
@@ -1800,7 +1800,7 @@ pub fn rustc_optgroups() -> Vec<RustcOptGroup> {
             "",
             "extern",
             "Specify where an external rust library is located",
-            "NAME=PATH",
+            "NAME[=PATH]",
         ),
         opt::multi_s(
             "",
diff --git a/src/librustdoc/lib.rs b/src/librustdoc/lib.rs
index 8cd32a3d1b508..13b8809e23e40 100644
--- a/src/librustdoc/lib.rs
+++ b/src/librustdoc/lib.rs
@@ -140,7 +140,7 @@ fn opts() -> Vec<RustcOptGroup> {
         }),
         stable("cfg", |o| o.optmulti("", "cfg", "pass a --cfg to rustc", "")),
         stable("extern", |o| {
-            o.optmulti("", "extern", "pass an --extern to rustc", "NAME=PATH")
+            o.optmulti("", "extern", "pass an --extern to rustc", "NAME[=PATH]")
         }),
         unstable("extern-html-root-url", |o| {
             o.optmulti("", "extern-html-root-url",