simh 3.10-RC1a

3.10 is mostly an attempt to get aligned with the current head of the
GitHub 4.0 sources. While the core libraries and SCP have diverged too
far for real forward and backward compatibility, enough 4.0 workalikes
have been added to allow much closer convergence of the two streams.

3.10 will provide the basis for my future simulation work.

PDP8/pdp8_ttx.c

@@ -76,7 +76,7 @@ uint8 ttix_buf[TTX_MAXL] = { 0 };                       /* input buffers */
 uint8 ttox_buf[TTX_MAXL] = { 0 };                       /* output buffers */
 TMLN ttx_ldsc[TTX_MAXL] = { {0} };                      /* line descriptors */
 TMXR ttx_desc = { TTX_INIL, 0, 0, ttx_ldsc };           /* mux descriptor */
-#define ttx_lines	ttx_desc.lines
+#define ttx_lines               ttx_desc.lines
 
 DEVICE ttix_dev, ttox_dev;
 int32 ttix (int32 IR, int32 AC);