git.txt: fix monospace rendering

When we write `<name>`s with the "s" tucked on to the closing backtick,
we end up rendering the backticks literally. Rephrase this sentence
slightly to render this as monospace.

Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/Documentation/git.txt b/Documentation/git.txt
index d36e6fd..3a9c449 100644
--- a/Documentation/git.txt
+++ b/Documentation/git.txt
@@ -88,7 +88,7 @@
 	empty string, instead the environment variable itself must be
 	set to the empty string.  It is an error if the `<envvar>` does not exist
 	in the environment. `<envvar>` may not contain an equals sign
-	to avoid ambiguity with `<name>`s which contain one.
+	to avoid ambiguity with `<name>` containing one.
 +
 This is useful for cases where you want to pass transitory
 configuration options to git, but are doing so on OS's where