Improve message in all rule in 1993/lmfjyh

It now clarifies that in the likely case it fails to compile the alt
version will be built as lmfjyh itself rather than suggesting one run
make alt (which basically did already). It does show how one can compile
the alt code manually still but it is not strictly necessary as this
entry is one of the rare cases where if the primary target fails the alt
target is built automatically.

thanks-for-help.md

@@ -1672,8 +1672,12 @@ files for functions.
 version](/1993/lmfjyh/README.md#alternate-code) which does what the program did
 with gcc < 2.3.3. See the README.md file for details and for why this was made
 the alternate version, not the actual entry. This alternate version will compile
-automatically in the very likely case (if you don't have gcc < 2.3.3) that the
-entry fails to compile.
+automatically (as `lmfjyh` itself) in the very likely case (if you don't have
+gcc < 2.3.3) that the entry fails to compile.
+
+Cody also made the Makefile delete the very unsafe filename that is compiled (or
+would be compiled if gcc < 2.3.3) whether or not compilation succeeds (which is
+highly unlikely).
 
 
 ## <a name="1993_plummer"></a>[1993/plummer](/1993/plummer/plummer.c) ([README.md](/1993/plummer/README.md]))