gitworkflows: Consistently back-quote git commands

Signed-off-by: Björn Gustavsson <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: bjorng

Documentation/gitworkflows.txt

@@ -229,7 +229,7 @@ To verify that 'master' is indeed a superset of 'maint', use git log:
 .Verify 'master' is a superset of 'maint'
 [caption="Recipe: "]
 =====================================
-git log master..maint
+`git log master..maint`
 =====================================
 
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