Fix small typos (#4357)

Author: Sweetdevil144

src/main/java/com/thealgorithms/io/BufferedReader.java

@@ -16,7 +16,7 @@ public class BufferedReader {
     private static final int DEFAULT_BUFFER_SIZE = 5;
 
     /**
-     * Maximum number of bytes the buffer can hold.
+     * The maximum number of bytes the buffer can hold.
      * Value is changed when encountered Eof to not
      * cause overflow read of 0 bytes
      */
@@ -100,7 +100,7 @@ public int peek(int n) throws IOException {
      * Removes the already read bytes from the buffer
      * in-order to make space for new bytes to be filled up.
      * <p>
-     * This may also do the job to read first time data (whole buffer is empty)
+     * This may also do the job to read first time data (the whole buffer is empty)
      */
 
     private void pushRefreshData() throws IOException {
@@ -116,7 +116,7 @@ private void pushRefreshData() throws IOException {
 
     /**
      * Reads one complete block of size {bufferSize}
-     * if found eof, the total length of array will
+     * if found eof, the total length of an array will
      * be that of what's available
      *
      * @return a completed block

src/main/java/com/thealgorithms/maths/AmicableNumber.java

@@ -15,9 +15,9 @@
  * <p>
  * link: https://en.wikipedia.org/wiki/Amicable_numbers
  * <p>
- * Simple Example : (220, 284)
- * 220 is divisible by {1,2,4,5,10,11,20,22,44,55,110} <- SUM = 284
- * 284 is divisible by {1,2,4,71,142} <- SUM = 220.
+ * Simple Example: (220, 284)
+ * 220 is divisible by {1,2,4,5,10,11,20,22,44,55,110} <-SUM = 284
+ * 284 is divisible by {1,2,4,71,142} <-SUM = 220.
  */
 public class AmicableNumber {
     /**