[gtksourceview/gtksourceview-4-6] Add contrasting draw-spaces foreground color

[Christian Hergert <chergert src gnome org>]

commit 2127fcbf2253fd475d11903b7c395d348d495105
Author: David Hewitt <davidmhewitt gmail com>
Date:   Tue Apr 7 09:30:37 2020 +0000

    Add contrasting draw-spaces foreground color

 data/styles/solarized-light.xml | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/data/styles/solarized-light.xml b/data/styles/solarized-light.xml
index e0984ce7..33d2bad6 100644
--- a/data/styles/solarized-light.xml
+++ b/data/styles/solarized-light.xml
@@ -33,6 +33,7 @@
   <color name="base1"   value="#93A1A1"/>
   <color name="base2"   value="#EEE8D5"/>
   <color name="base3"   value="#FDF6E3"/>
+  <color name="base4"   value="#C8CCC2"/>
   <color name="yellow"  value="#B58900"/>
   <color name="orange"  value="#CB4B16"/>
   <color name="red"     value="#DC322F"/>
@@ -51,6 +52,7 @@
   <style name="current-line"                background="base2"/>
   <style name="line-numbers"                foreground="base1" background="base2"/>
   <style name="background-pattern"          background="base3-2-blend"/>
+  <style name="draw-spaces"                 foreground="base4"/>
 
   <!-- Bracket Matching -->
   <style name="bracket-match"               foreground="base3" background="base1"/>