Increase Powerline overlap (only rounded)

[why]
We still fight with the faint lines on the big side of the powerline
glyphs. They come from the LCD antialiasing mode that has problems with
the borders.

Other fonts use far more overlap. We use only a modest amount of overlap
(1% of the width).

[how]
As the other fonts do, increase the overlap (to 6% now).

Add full-hight 'landing platforms' on the outsides of the glyphs,
which are 7% wide.

Related: a8b9e1d
Related: #1245

Fixes: #1547

Signed-off-by: Fini Jastrow <ulf.fini.jastrow@desy.de>

font-patcher

@@ -857,9 +857,9 @@ class font_patcher:
             0xe0b3: {'align': 'r', 'valign': 'c', 'stretch': 'xy', 'params': {'xy-ratio': 0.7}},
 
             # Rounded arcs
-            0xe0b4: {'align': 'l', 'valign': 'c', 'stretch': 'xy', 'params': {'overlap': 0.01, 'xy-ratio': 0.59}},
+            0xe0b4: {'align': 'l', 'valign': 'c', 'stretch': 'xy', 'params': {'overlap': 0.06, 'xy-ratio': 0.59}},
             0xe0b5: {'align': 'l', 'valign': 'c', 'stretch': 'xy', 'params': {'xy-ratio': 0.5}},
-            0xe0b6: {'align': 'r', 'valign': 'c', 'stretch': 'xy', 'params': {'overlap': 0.01, 'xy-ratio': 0.59}},
+            0xe0b6: {'align': 'r', 'valign': 'c', 'stretch': 'xy', 'params': {'overlap': 0.06, 'xy-ratio': 0.59}},
             0xe0b7: {'align': 'r', 'valign': 'c', 'stretch': 'xy', 'params': {'xy-ratio': 0.5}},
 
             # Bottom Triangles

src/glyphs/powerline-extra/README.md

@@ -7,5 +7,7 @@ For more information have a look at the upstream website: https://github.com/rya
 * Add missing Ice Waveform Mirrored glyph (0xE0CA)
 * Add Trigraph Heaven glyph (0x2630)
 * Simplify Waveform glyphs (0xE0C8, 0xE0CA)
+* Glyph 0xE0B4 and 0xE0B6 got an additional 7% strip on their straight side.
+* Change version of font to 1.001
 
 Version: 1.000 (from about 2016)