bug#26145: [PATCH 1/2] doc: Fix examples.

[Hartmut Goebel]

To "spawns a Guile REPL", --ad-hoc is required.

* doc/guix.texi (Invoking guix environment): Add "--ad-hoc" to
  container examples.
---
 doc/guix.texi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/doc/guix.texi b/doc/guix.texi
index 3db6dad..88f4a05 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -6396,7 +6396,7 @@ home directory is accessible read-only via the 
@file{/exchange}
 directory:
 
 @example
-guix environment --container --expose=$HOME=/exchange guile -- guile
+guix environment --container --expose=$HOME=/exchange --ad-hoc guile -- guile
 @end example
 
 @item address@hidden@var{target}]
@@ -6410,7 +6410,7 @@ home directory is accessible for both reading and writing 
via the
 @file{/exchange} directory:
 
 @example
-guix environment --container --share=$HOME=/exchange guile -- guile
+guix environment --container --share=$HOME=/exchange --ad-hoc guile -- guile
 @end example
 @end table
 
-- 
2.7.4