JDK 15 RFR of JDK-8244673: Add periods to SourceVersion.isName javadoc

[Joe Darcy]

Hello,

While doing a CSR review, I noticed a few missing periods of two methods 
in SourceVersion; the patch for adding the periods is below.

Thanks,

-Joe

--- 
a/src/java.compiler/share/classes/javax/lang/model/SourceVersion.java 
Sat May 09 09:49:08 2020 +0530
+++ 
b/src/java.compiler/share/classes/javax/lang/model/SourceVersion.java 
Sat May 09 09:35:22 2020 -0700
@@ -325,7 +325,7 @@
       * literal in any segment.
       *
       * This method returns {@code true} for <i>restricted
-     * keywords</i> and <i>restricted identifiers</i>
+     * keywords</i> and <i>restricted identifiers</i>.
       *
       * @param name the string to check
       * @return {@code true} if this string is a
@@ -351,7 +351,7 @@
       * literal in any segment.
       *
       * This method returns {@code true} for <i>restricted
-     * keywords</i> and <i>restricted identifiers</i>
+     * keywords</i> and <i>restricted identifiers</i>.
       *
       * @param name the string to check
       * @param version the version to use