Java: don't generate past participle name suggestion when the word contains anything other than an ascii letter

GitOrigin-RevId: e0271568a5b61d073b344c200c1ebf3490840930

platform/platform-tests/testSrc/com/intellij/openapi/util/text/PastParticipleTest.java

@@ -115,6 +115,7 @@ public class PastParticipleTest {
     assertEquals("matches", pastParticiple("matches"));
     assertEquals("equals", pastParticiple("equals"));
     assertEquals("of", pastParticiple("of"));
-    //assertEquals("running", generatePastParticiple("running"));
+    assertEquals("проблем", pastParticiple("проблем"));
+    assertEquals("string1", pastParticiple("string1"));
   }
 }

platform/util/src/com/intellij/openapi/util/text/PastParticiple.java

@@ -105,9 +105,16 @@ public class PastParticiple {
     char c1 = toLowerCase(verb.charAt(length - 1));
     char c2 = toLowerCase(verb.charAt(length - 2));
     if (c1 == 's' && (c2 == 'e' || c2 == 'l')) return true;
+    for (int i = 0; i < length; i++) {
+      if (!isAsciiLetter(verb.charAt(i))) return true;
+    }
     return false;
   }
-  
+
+  private static boolean isAsciiLetter(char c) {
+    return c >= 'A' && c <= 'Z' || c >= 'a' && c <= 'z';
+  }
+
   private static char toLowerCase(char c) {
     return (char)(c | 0x20); // cheap hack
   }