[code review] revert unrelated changes (typos, other fixes)

Author: asolntsev

src/main/java/net/datafaker/idnumbers/HungarianIdNumber.java

@@ -64,12 +64,12 @@ private String basePart(BaseProviders faker, LocalDate birthday, PersonIdNumber.
 
     static int getCheckDigit(String basePart) {
         char[] numbers = basePart.toCharArray();
-        int sum = 0;
+        int summ = 0;
         for (int i = 0; i < numbers.length; i++) {
-            sum += getNumericValue(numbers[i]) * (i + 1);
+            summ += getNumericValue(numbers[i]) * (i + 1);
         }
 
-        return sum % 11;
+        return summ % 11;
     }
 
     static int firstDigit(int birthYear, PersonIdNumber.Gender gender) {

src/main/java/net/datafaker/idnumbers/IdNumberGenerator.java

@@ -27,7 +27,7 @@ default String generateValid(BaseProviders faker) {
     String generateInvalid(BaseProviders faker);
 
     /**
-     * Generates a valid ID number for given country corresponding to given criteria (age range, gender etc.)
+     * Generates a valid ID number for given country corresponding to given criterias (age range, gender etc.)
      *
      * @return PersonIdNumber containing a valid combination of ID, Birthday and Gender.
      * In countries where ID number doesn't contain gender and/or birthday, the latter values are just random.

src/main/java/net/datafaker/internal/helper/SingletonLocale.java

@@ -30,7 +30,19 @@ public static SingletonLocale get(@Nullable Locale locale) {
     }
 
     public static SingletonLocale getRequired(Locale locale) {
-        return LOCALE2SINGLETON_LOCALE.computeIfAbsent(locale, (__) -> new SingletonLocale(locale));
+        SingletonLocale res = LOCALE2SINGLETON_LOCALE.get(locale);
+        if (res != null) {
+            return res;
+        }
+        synchronized (SingletonLocale.class) {
+            res = LOCALE2SINGLETON_LOCALE.get(locale);
+            if (res != null) {
+                return res;
+            }
+            res = new SingletonLocale(locale);
+            LOCALE2SINGLETON_LOCALE.put(locale, res);
+            return res;
+        }
     }
 
     public Locale getLocale() {

src/main/java/net/datafaker/providers/base/Barcode.java

@@ -55,9 +55,9 @@ private long ean(int length) {
         while (number > 0) {
             i++;
             if (i % 2 == 1) {
-                odd += (int) (number % 10);
+                odd += number % 10;
             } else {
-                even += (int) (number % 10);
+                even += number % 10;
             }
 
             number /= 10;

src/main/java/net/datafaker/providers/base/Lorem.java

@@ -113,7 +113,7 @@ public String sentence(int wordCount) {
     public String sentence(int wordCount, int randomWordsToAdd) {
         int numberOfWordsToAdd = randomWordsToAdd == 0 ? 0 : faker.random().nextInt(randomWordsToAdd);
         final int totalWordCount = wordCount + numberOfWordsToAdd;
-        StringBuilder sb = new StringBuilder(wordCount * 9);
+        StringBuilder sb = new StringBuilder();
         if (totalWordCount > 0) {
             sb.append(capitalizeWords(word()));
         }

src/test/java/net/datafaker/service/FakeValuesServiceTest.java

@@ -210,7 +210,6 @@ void testLocalesChainGetterRu() {
     }
 
     @Test
-    @SuppressWarnings("deprecation")
     void testFakerContextSetLocale() {
         final FakerContext fakerContext = new FakerContext(new Locale("en"), new RandomService());
         fakerContext.setLocale(new Locale("uk"));