[LyX/2.1.x] Math.lyx: fix a typo

[Uwe Stöhr]

commit 2038b98ad2adb0d607af2664403f09463d6a38e9
Author: Uwe Stöhr <uwesto...@lyx.org>
Date:   Sun Oct 25 04:20:27 2015 +0100

    Math.lyx: fix a typo

diff --git a/lib/doc/Math.lyx b/lib/doc/Math.lyx
index 815ab21..60095e4 100644
--- a/lib/doc/Math.lyx
+++ b/lib/doc/Math.lyx
@@ -1532,7 +1532,7 @@ arg   "math-superscript"
 \begin_inset Text
 
 \begin_layout Plain Layout
-command
+Command
 \end_layout
 
 \end_inset