Handle case "robbil alamin" (#32)

* add test cases

* handle the case

* bump version

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "quranize"
-version = "0.10.5"
+version = "0.10.6"
 authors = ["Alfan Nur Fauzan <[email protected]>"]
 edition = "2021"
 description = "Encoding transliterations into Quran forms."

src/lib.rs

@@ -254,6 +254,7 @@ mod tests {
         assert_eq!(q.e("lirrohman"), vec!["للرحمن"]);
         assert_eq!(q.e("wantum muslimun"), vec!["وأنتم مسلمون"]);
         assert_eq!(q.e("laa yukallifullah"), vec!["لا يكلف الله"]);
+        assert_eq!(q.e("robbil alamin"), vec!["رب العالمين"]);
 
         assert_eq!(
             q.e("bismillahirrohmanirrohiim"),

src/transliterations.rs

@@ -57,14 +57,18 @@ pub(crate) fn map(c: char) -> &'static [&'static str] {
     }
 }
 
-pub(crate) fn contextual_map(prev_c: char, c: char) -> &'static [&'static str] {
-    match (prev_c, c) {
-        (' ', 'ا') | ('ب', 'ا') | ('ا', 'ل') | ('آ', 'ل') | ('و', 'ا') | ('أ', 'و') => {
-            &[""]
-        }
+pub(crate) fn contextual_map(c0: char, c1: char) -> &'static [&'static str] {
+    match (c0, c1) {
+        (' ', 'ا')
+        | ('ب', 'ا')
+        | ('ا', 'ل')
+        | ('آ', 'ل')
+        | ('و', 'ا')
+        | ('أ', 'و')
+        | ('ع', 'ا') => &[""],
         ('\0', 'ا') => &["i", "u"],
         ('ل', 'ل') => &["i"],
-        (_, TASYDID) => map(prev_c),
+        (_, TASYDID) => map(c0),
         _ => &[],
     }
 }