Mesa (main): docs: use file-role for paths

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Module: Mesa
Branch: main
Commit: 7268a429ce74c631d675032bc2c962af445e127d
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=7268a429ce74c631d675032bc2c962af445e127d

Author: Erik Faye-Lund <erik.faye-lund at collabora.com>
Date:   Tue Jun  1 11:36:46 2021 +0200

docs: use file-role for paths

Reviewed-by: Chia-I Wu <olvaffe at gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11106>

---

 docs/envvars.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/envvars.rst b/docs/envvars.rst
index 58a5ed0978e..46595e78006 100644
--- a/docs/envvars.rst
+++ b/docs/envvars.rst
@@ -419,7 +419,7 @@ Gallium environment variables
 ``ST_DEBUG``
    controls debug output from the Mesa/Gallium state tracker. Setting to
    ``tgsi``, for example, will print all the TGSI shaders. See
-   ``src/mesa/state_tracker/st_debug.c`` for other options.
+   :file:`src/mesa/state_tracker/st_debug.c` for other options.
 
 Clover environment variables
 ----------------------------