Remove cyrillic characters from doc utils makepdf error is resolved

docs/credits/contributors.rst

@@ -15,7 +15,7 @@ Bug fixes
 ---------
 * Aziz M. Bookwala (https://github.com/azizmb)
 * IHLeanne (https://github.com/IHLeanne)
-* Сергей Глита [Sergey Glita] (s.v.glita@gmail.com)
+* Sergey Glita (s.v.glita@gmail.com)
 * Meurig Freeman (https://github.com/meurig)
 * David Herring (https://github.com/abadger1406)
 
@@ -27,7 +27,7 @@ Bug reports
 * Joost Cassee (joost@cassee.net, https://github.com/jcassee)
 * Brian Huxley
 * dAnjou (https://github.com/dAnjou)
-* Сергей Глита [Sergey Glita] (s.v.glita@gmail.com)
+* Sergey Glita (s.v.glita@gmail.com)
 * IHLeanne (https://github.com/IHLeanne)
 * valterwill (https://github.com/valterwill)
 * David Herring (https://github.com/abadger1406)
@@ -37,14 +37,14 @@ Bug reports
 Patches
 -------
 * Meurig Freeman (https://github.com/meurig)
-* Сергей Глита [Sergey Glita] (s.v.glita@gmail.com)
+* Sergey Glita (s.v.glita@gmail.com)
 * Brian E (brian@realize.org)
 
 
 Suggestions
 -----------
 * Cezar Jenkins (https://twitter.com/#!/emperorcezar)
-* Сергей Глита [Sergey Glita] (s.v.glita@gmail.com)
+* Sergey Glita (s.v.glita@gmail.com)
 * Barry Rowlingson (http://geospaced.blogspot.com)
 * Gour (https://github.com/gour)
 * Alexandru Kiss (usurel@gmail.com)
@@ -59,7 +59,7 @@ Translations
 
 * Russian
 
-  - Сергей Глита [Sergey Glita] (s.v.glita@gmail.com)
+  - Sergey Glita (s.v.glita@gmail.com)
 
 * Italian
 
@@ -72,7 +72,7 @@ Translations
 
 Remote access for debugging
 ---------------------------
-* Сергей Глита [Sergey Glita] (s.v.glita@gmail.com)
+* Sergey Glita (s.v.glita@gmail.com)
 * David Herring (https://github.com/abadger1406)
 * Michael Terretta (terretta@gmail.com)
 * Alexandru Kiss (usurel@gmail.com)