No need to end exception messages with an exclamation!

Author: garydgregory

src/main/java/org/apache/commons/imaging/formats/jpeg/segments/SofnSegment.java

@@ -119,7 +119,7 @@ public SofnSegment(final int marker, final int markerLength, final InputStream i
         width = read2Bytes("width", is, "Not a Valid JPEG File", getByteOrder());
         numberOfComponents = readByte("numberOfComponents", is, "Not a Valid JPEG File");
         if (numberOfComponents < 0) {
-            throw new ImagingException("The number of components in a SOF0Segment cannot be less than 0!");
+            throw new ImagingException("The number of components in a SOF0Segment cannot be less than 0.");
         }
         components = Allocator.array(numberOfComponents, Component[]::new, Component.SHALLOW_SIZE);
         for (int i = 0; i < numberOfComponents; i++) {

src/main/java/org/apache/commons/imaging/formats/xpm/XpmImageParser.java

@@ -289,7 +289,7 @@ private int parseColor(String color) throws ImagingException {
             return 0x00000000;
         }
         if (color.charAt(0) == '%') {
-            throw new ImagingException("HSV colors are not implemented even in the XPM specification!");
+            throw new ImagingException("HSV colors are not implemented even in the XPM specification.");
         }
         if ("None".equals(color)) {
             return 0x00000000;