Fix button field names in input guide
Fixes #2056
(cherry picked from commit 46950a5e61ae6febb6dd554aea212f9130927b98)
diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
index e80a0fe..0bc0cd2 100644
--- a/CONTRIBUTORS.md
+++ b/CONTRIBUTORS.md
@@ -29,6 +29,7 @@
- David Carlier
- Arturo Castro
- Chi-kwan Chan
+ - TheChocolateOre
- Joseph Chua
- Ian Clarkson
- Michał Cichoń
diff --git a/docs/input.dox b/docs/input.dox
index d9c27a6..7514e95 100644
--- a/docs/input.dox
+++ b/docs/input.dox
@@ -818,7 +818,7 @@
All subsequent values are in the form `<field>:<value>` and describe the layout
of the mapping. These fields may not all be present and may occur in any order.
-The button fields are `a`, `b`, `c`, `d`, `back`, `start`, `guide`, `dpup`,
+The button fields are `a`, `b`, `x`, `y`, `back`, `start`, `guide`, `dpup`,
`dpright`, `dpdown`, `dpleft`, `leftshoulder`, `rightshoulder`, `leftstick` and
`rightstick`.
