Fix UseVarForPrimitive description (#252)

Adds missing space and fixes mis-spelling and grammar issues.

Author: mike-solomon

src/main/java/org/openrewrite/java/migrate/lang/var/UseVarForPrimitive.java

@@ -45,8 +45,8 @@ public String getDisplayName() {
     @Override
     public String getDescription() {
         //language=markdown
-        return "Try to apply local variable type inference `var` to primitiv variables where possible." +
-               "This recipe will not touch variable declaration with initializer containing ternary operators.";
+        return "Try to apply local variable type inference `var` to primitive variables where possible. " +
+               "This recipe will not touch variable declarations with initializers containing ternary operators.";
     }