goto file: sort files by name-without-extension (IDEA-194877)

java/java-tests/testSrc/com/intellij/java/navigation/ChooseByNameTest.groovy

@@ -143,6 +143,12 @@ class Intf {
     assert gotoFile('i') == [i, index]
   }
 
+  void "test prefer shorter filename match"() {
+    def shorter = addEmptyFile("foo/cp-users.txt")
+    def longer = addEmptyFile("cp-users-and-smth.html")
+    assert gotoFile('cpusers') == [shorter, longer]
+  }
+
   void "test consider dot-idea files out of project"() {
     def outside = addEmptyFile(".idea/workspace.xml")
     def inside = addEmptyFile("workspace.txt")

platform/lang-impl/src/com/intellij/ide/actions/GotoFileItemProvider.java

@@ -163,9 +163,11 @@ public class GotoFileItemProvider extends DefaultChooseByNameItemProvider {
     }
 
     if (group.size() > 1) {
+      //noinspection StringToUpperCaseOrToLowerCaseWithoutLocale
       Collections.sort(group,
                        Comparator.<PsiFileSystemItem, Boolean>comparing(f -> f instanceof PsiDirectory).
                          thenComparing(qualifierMatchingDegrees::get).
+                         thenComparing(i -> FileUtilRt.getNameWithoutExtension(i.getName()).toLowerCase()).
                          thenComparing(i -> i.getName().toLowerCase()).
                          thenComparing(nesting::get).
                          thenComparing(dirCloseness::get).