fileexists and is readable

l3build-file-functions.lua

@@ -259,7 +259,7 @@ function fileexists(file)
     f:close()
     return true
   else
-    return false
+    return false -- also file exits and is not readable
   end
 end
 

l3build.dtx

@@ -1616,7 +1616,7 @@
 %     |abspath(|\meta{target}|)|
 %   \end{syntax}
 %   Returns a string which gives the absolute location of the
-%   \meta{target} directory. The \meta{target} directory must exist and be accessible.
+%   \meta{target} directory.
 % \end{function}
 %
 % \begin{function}{dirname()}
@@ -1662,7 +1662,7 @@
 %   \begin{syntax}
 %     |fileexists(|\meta{file}|)|
 %   \end{syntax}
-%   Tests if the \meta{file} exists; returns a boolean value.
+%   Tests if the \meta{file} exists and is readable; returns a boolean value.
 % \end{function}
 %
 % \begin{function}{filelist()}