Do not autocorrect ordinals

java/src/org/futo/inputmethod/latin/Suggest.java

@@ -210,6 +210,8 @@ public static SuggestedWords obtainNonBatchedInputSuggestedWords(
                 // If the word is entirely digits, never autocorrect regardless of number row
                 // being active or not
                 || wordComposer.isEntirelyDigits()
+                // If it's an ordinal (1st, 2nd, 3rd), do not autocorrect
+                || wordComposer.isOrdinal(locale)
                 // If the word is mostly caps, we never auto-correct because this is almost
                 // certainly intentional (and careful input)
                 || wordComposer.isMostlyCaps()

java/src/org/futo/inputmethod/latin/WordComposer.java

@@ -30,6 +30,7 @@
 
 import java.util.ArrayList;
 import java.util.Collections;
+import java.util.Locale;
 
 import javax.annotation.Nonnull;
 
@@ -361,6 +362,16 @@ public boolean isEntirelyDigits() {
         return mDigitsCount == mCodePointSize;
     }
 
+    /**
+     * Returns true if the composing word is an ordinal
+     */
+    public boolean isOrdinal(Locale locale) {
+        final String word = getTypedWord();
+
+        // TODO: This is English-only
+        return word.matches("^(\\d+)(st|nd|rd|th)$");
+    }
+
     /**
      * Saves the caps mode at the start of composing.
      *