Testing version of Release 5.2.7

[Ethan M. (UW) <me...@uw...>]

I have placed a tarball gnuplot-5.2.7beta.tar.gz in the "testing" folder on SourceForge.

 https://sourceforge.net/projects/gnuplot/files/gnuplot/testing/

This version identifies as 5.2.7beta and is intended for test-builds on Windows,
OSX, etc prior to full release of 5.2.7 at the end of the month.
Please report and build problems before then.

There are many more changes than is usual for a patchlevel release this late in 
the series.  I do not know why, but perhaps it has taken longer than usual for
various linux distributions to include any version of the current major release
so end-users only recently switched to 5.2 from 5.0.  Maybe.

	Ethan



		GNUPLOT Version 5.2.7 Release Notes
		===================================

These release notes are for version 5.2 patchlevel 7 (5.2.7).
This release contains bug-fixes, a few changes back-ported from the
development version, and some minor new features.
The largest change is a revised fig terminal that brings it into line
with capabilities of other version 5 terminals.

Please see the ChangeLog file for a complete list of changes made during the
course of development from 5.0 to 5.2.

Release Notes date: 14-May-2019

Changes in 5.2.7
================

* NEW "set pm3d noclipcb" will skip drawing quadrangles with color < cbmin
* NEW pm terminal supports utf8, dashed lines, bold/italic text
* NEW imaginary component of array values is available to "using" in column 3
* NEW gnuplot --slow may help use of qt terminal with slow system font server
* CHANGE splot "with points pt 0" acts like "with dots"
* CHANGE (tikz) improved default interpretation of gnuplot arrowhead style
* CHANGE teach hidden3d to handle double-headed vectors (arrowstyle "heads")
* CHANGE "unset title" or "reset" resets all title properties to default
* CHANGE font names passed to enhanced text processing may be in quotes
* CHANGE cairo terminals accept fractional font sizes
* CHANGE "plot with table" does not output trailing field separator
* CHANGE better centering for clustered histograms
* CHANGE clear STATS_* variables before performing analysis
* CHANGE cairo, libgd, and svg terminals handle LT_NODRAW by not drawing at all
* CHANGE svg terminal clickable icons are in-line data rather than external refs
* CHANGE revise space allocated for ylabel; allow text justification for ylabel
* CHANGE reduce overhead, making it feasible to have 10^6 hypertext labels
* FIX "plot with table" unnecessarily limited string column output to 60 chars 
* FIX (windows) make sure graph window is shown even if the program is "hidden"
* FIX hidden3d mode was not correctly dealing with arrowstyle backhead
* FIX sprintf in 'using' spec must not clobber numeric locale
* FIX tikz - request for polygon with 0 vertices could hang terminal
* FIX lua/tikz - do not attempt to ftruncate output being piped through stdout
* FIX tkcanvas - do not attempt to ftruncate output being piped through stdout
* FIX handle NaN values in input stream to "stats FOO matrix"
* FIX prevent extra read past the end of a datablock holding matrix data
* FIX pm - issues in box and polygon fill, (wide) lines, enhanced text, images
* FIX dropped character in piped input stream if plot window is manually closed
* FIX extraneous dots and potential segfault from splot with contour labels
* FIX boxplots - color sequence correctly starts with specified linetype
* FIX incomplete initialization led to segfault from "gnuplot -c foo.gp baz"
* FIX Allow "pm3d depthorder base" to handle 3D quadrangles with logscale z