xterm256 output

highlight eats leading spaces with truecolor or xterm256 output type. this happens for lines with more than one space at the beginning of a line

the simple fix

--- highlight-3.45/src/core/xterm256generator.cpp.orig  2018-10-07 11:06:55.751341724 +0300
+++ highlight-3.45/src/core/xterm256generator.cpp   2018-10-07 11:07:18.725343936 +0300
@@ -44,7 +44,7 @@
 {
     newLineTag = "\n";
     spacer = " ";
-    maskWs=true; // needed if canvasPadding > 0; requires tab replacement
+    maskWs=false; // needed if canvasPadding > 0; requires tab replacement
 }
 
 Xterm256Generator::~Xterm256Generator() {}