change demo order

doc/man/man1/notcurses-demo.1

@@ -20,7 +20,7 @@ on your terminal after the program exits.
 Print a usage message, and exit with success.
 .TP
 .IR demospec
-Select which demos to run, and what order to run them in. The default is "isumbgwvpo". See below for a list of demos.
+Select which demos to run, and what order to run them in. The default is "imbgsuwvpo". See below for a list of demos.
 .SH DESCRIPTION
 .B notcurses-demo
 contains a set of text-based demonstrations of capabilities from the notcurses library. The demonstrations include:

src/demo/demo.c

@@ -9,6 +9,8 @@
 #include <notcurses.h>
 #include "demo.h"
 
+static const char DEFAULT_DEMO[] = "imbgsuwvpo";
+
 int timespec_subtract(struct timespec *result, const struct timespec *time0,
                       struct timespec *time1){
   if(time0->tv_nsec < time1->tv_nsec){
@@ -324,7 +326,7 @@ int main(int argc, char** argv){
     if(argv[optind] != NULL){
       usage(*argv, EXIT_FAILURE);
     }
-    demos = "isumbgwvpo";
+    demos = DEFAULT_DEMO;
   }
   if((nc = notcurses_init(&nopts)) == NULL){
     return EXIT_FAILURE;

src/demo/unicodeblocks.c

@@ -172,6 +172,7 @@ int unicodeblocks_demo(struct notcurses* nc){
       cell_release(n, &c);
     }
     ncplane_set_fg_rgb(n, 0x40, 0xc0, 0x40);
+    ncplane_set_bg_rgb(n, 0, 0, 0);
     if(ncplane_cursor_move_yx(n, 6 + BLOCKSIZE / CHUNKSIZE, 0)){
       return -1;
     }

src/demo/widecolor.c

@@ -578,6 +578,7 @@ int widecolor_demo(struct notcurses* nc){
   struct ncplane* n = notcurses_stdplane(nc);
   size_t i;
   const size_t screens = sizeof(steps) / sizeof(*steps);
+  ncplane_erase(n);
   for(i = 0 ; i < screens ; ++i){
     ncspecial_key special;
     cell c;
@@ -587,7 +588,6 @@ int widecolor_demo(struct notcurses* nc){
       const int rollover = 256 / ((step & 0xff) | ((step & 0xff00) >> 8u)
                                   | ((step & 0xff0000) >> 16u));
       int rollcount = 0; // number of times we've added this step
-      //ncplane_erase(n);
       int dimy, dimx;
       notcurses_resize(nc, &dimy, &dimx);
       cell_init(&c);