Edited doc. file.

shlaikov · Алексей Шлайков · commit 634680c516ff · 2017-10-05T19:23:00.000+03:00
diff --git a/doc/book/validators/credit-card.md b/doc/book/validators/credit-card.md
@@ -33,6 +33,7 @@ The following issuing institutes are accepted:
 - Solo
 - Visa
 - Visa Electron
+- Russia Mir
 
 > ### Invalid institutes
 >

Original file line number	Diff line number	Diff line change
`@@ -33,6 +33,7 @@ The following issuing institutes are accepted:`
`33`	`33`	`- Solo`
`34`	`34`	`- Visa`
`35`	`35`	`- Visa Electron`
	`36`	`+- Russia Mir`
`36`	`37`
`37`	`38`	`> ### Invalid institutes`
`38`	`39`	`>`