[hackers] [libzahl] refsheet: zperror's param may be empty, which is treated especially || Mattias Andrée

[git]

commit 9b76439123bacc41647d11d2bc159f0b9082ed4d
Author:     Mattias Andrée <maand...@kth.se>
AuthorDate: Sun May 1 01:52:16 2016 +0200
Commit:     Mattias Andrée <maand...@kth.se>
CommitDate: Sun May 1 01:52:16 2016 +0200

    refsheet: zperror's param may be empty, which is treated especially
    
    Signed-off-by: Mattias Andrée <maand...@kth.se>

diff --git a/doc/refsheet.tex b/doc/refsheet.tex
index e3e00c9..4c9d42a 100644
--- a/doc/refsheet.tex
+++ b/doc/refsheet.tex
@@ -43,7 +43,7 @@ Unless specified otherwise, returns are {\tt void} and all 
parameters are of typ
 \entryTwo{zerror(a)}  {Get error code}          {returns {\tt enum zerror}, 
and stores}
                                                 {description in {\tt const 
char **a}}
 \entryTwo{zperror(a)} {Print error description} {behaves like {\tt perror(a)}, 
{\tt a} is a,}
-                                                {possibly {\tt NULL}, {\tt 
const char *}}
+                                                {possibly {\tt NULL} or 
$\varepsilon$, {\tt const char *}}
 %\\
 
 \textbf{Arithmetic} \\