[LyX/master] Fix display of \leq, \geq, and \lnot in mathed

[Enrico Forestieri]

commit 7c82ab32052cb5951d239977ac2d740faa7a5f6e
Author: Enrico Forestieri <for...@lyx.org>
Date:   Mon Jul 4 21:49:55 2016 +0200

    Fix display of \leq, \geq, and \lnot in mathed
    
    Commit 343a379b used a wrong syntax that was causing the display
    of the above symbols as blanks.
---
 lib/symbols |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/symbols b/lib/symbols
index a648fb5..28d6bfc 100644
--- a/lib/symbols
+++ b/lib/symbols
@@ -1120,11 +1120,11 @@ pod                lyxblacktext  0   0 func     x     
amsmath
 # pre-defined macros
 #
 
-\def\leq\le                                                     mathrel &le;
-\def\geq\ge                                                     mathrel &ge;
+\def\leq{\le}                                                   mathrel &le;
+\def\geq{\ge}                                                   mathrel &ge;
 \def\neq{\not=}                                                 mathrel &ne;
 \def\ne{\not=}                                                  mathrel &ne;
-\def\lnot\neg                                                   mathord &not;
+\def\lnot{\neg}                                                 mathord &not;
 \def\notin{\not\in}
 \def\slash{/}