Fix docs

Author: behrang

Readme.md

@@ -1,6 +1,6 @@
 # Jalaali Haskell
 
-Functions for working with Jalaali (Jalali, Persian, Khayyami, Khorshidi, Shamsi) calendar systems.
+Functions for working with Jalaali (Jalali, Persian, Khayyami, Khorshidi, Shamsi) calendar system.
 
 ## About
 

jalaali.cabal

@@ -8,8 +8,8 @@ cabal-version: 1.12
 
 name:           jalaali
 version:        1.0.0.0
-synopsis:       Jalaali calendar systems
-description:    Functions for working with Jalaali (Jalali, Persian, Khayyami, Khorshidi, Shamsi) calendar systems. Please see the README on GitHub at <https://github.com/jalaali/jalaali-hs#readme>
+synopsis:       Jalaali calendar system
+description:    Functions for working with Jalaali (Jalali, Persian, Khayyami, Khorshidi, Shamsi) calendar system. Please see the README on GitHub at <https://github.com/jalaali/jalaali-hs#readme>
 category:       Time
 homepage:       https://github.com/jalaali/jalaali-hs#readme
 bug-reports:    https://github.com/jalaali/jalaali-hs/issues

package.yaml

@@ -10,12 +10,12 @@ extra-source-files:
 - README.md
 - ChangeLog.md
 
-synopsis:            Jalaali calendar systems
+synopsis:            Jalaali calendar system
 category:            Time
 
 description:         Functions for working with
                      Jalaali (Jalali, Persian, Khayyami, Khorshidi, Shamsi)
-                     calendar systems.
+                     calendar system.
                      Please see the README on GitHub at <https://github.com/jalaali/jalaali-hs#readme>
 
 dependencies:

src/Data/Time/Calendar/Jalaali.hs

@@ -1,4 +1,4 @@
--- | Functions for working with Jalaali calendar systems.
+-- | Functions for working with Jalaali calendar system.
 -- This library mimics the API of "Data.Time.Calendar.Gregorian".
 module Data.Time.Calendar.Jalaali
   ( isJalaaliLeapYear