8075362: j.u.Properties.load() methods have misaligned @throws clauses
Summary: Add spaces to align the @throws clauses, and rename Basic.java test and its @summary clause.
Reviewed-by: rriggs
./bootstrap/bin/javac
./bootstrap/bin/javadoc
./bootstrap/bin/javah
./bootstrap/lib/doclets.jar
./bootstrap/lib/javac.jar
./bootstrap/lib/javadoc.jar
./bootstrap/lib/javah.jar
./lib/classes.jar
./lib/src.zip