tweaks: rename a function plus two parameters, to be more fitting

src/prompt.c

@@ -700,20 +700,20 @@ int do_yesno_prompt(bool all, const char *msg)
 	    /* Now show the ones for "Yes", "No", "Cancel" and maybe "All". */
 	    sprintf(shortstr, " %c", yesstr[0]);
 	    wmove(bottomwin, 1, 0);
-	    onekey(shortstr, _("Yes"), width);
+	    post_one_key(shortstr, _("Yes"), width);
 
 	    if (all) {
 		shortstr[1] = allstr[0];
 		wmove(bottomwin, 1, width);
-		onekey(shortstr, _("All"), width);
+		post_one_key(shortstr, _("All"), width);
 	    }
 
 	    shortstr[1] = nostr[0];
 	    wmove(bottomwin, 2, 0);
-	    onekey(shortstr, _("No"), width);
+	    post_one_key(shortstr, _("No"), width);
 
 	    wmove(bottomwin, 2, width);
-	    onekey("^C", _("Cancel"), width);
+	    post_one_key("^C", _("Cancel"), width);
 	}
 
 	/* Color the statusbar over its full width and display the question. */

src/proto.h

@@ -655,7 +655,7 @@ void statusbar(const char *msg);
 void warn_and_shortly_pause(const char *msg);
 void statusline(message_type importance, const char *msg, ...);
 void bottombars(int menu);
-void onekey(const char *keystroke, const char *desc, int length);
+void post_one_key(const char *keystroke, const char *tag, int width);
 void place_the_cursor(void);
 void edit_draw(filestruct *fileptr, const char *converted,
 	int line, size_t from_col);

src/winio.c

@@ -2336,7 +2336,7 @@ void bottombars(int menu)
 
 	wmove(bottomwin, 1 + i % 2, (i / 2) * itemwidth);
 
-	onekey(s->keystr, _(f->desc), itemwidth + (COLS % itemwidth));
+	post_one_key(s->keystr, _(f->desc), itemwidth + (COLS % itemwidth));
 	i++;
     }
 
@@ -2345,25 +2345,24 @@ void bottombars(int menu)
     wrefresh(bottomwin);
 }
 
-/* Write a shortcut key to the help area at the bottom of the window.
- * keystroke is e.g. "^G" and desc is e.g. "Get Help".  We are careful
- * to write at most length characters, even if length is very small and
- * keystroke and desc are long.  Note that waddnstr(,,(size_t)-1) adds
- * the whole string!  We do not bother padding the entry with blanks. */
-void onekey(const char *keystroke, const char *desc, int length)
+/* Write a key's representation plus a minute description of its function
+ * to the screen.  For example, the key could be "^C" and its tag "Cancel".
+ * Key plus tag may occupy at most width columns. */
+void post_one_key(const char *keystroke, const char *tag, int width)
 {
     wattron(bottomwin, interface_color_pair[KEY_COMBO]);
-    waddnstr(bottomwin, keystroke, actual_x(keystroke, length));
+    waddnstr(bottomwin, keystroke, actual_x(keystroke, width));
     wattroff(bottomwin, interface_color_pair[KEY_COMBO]);
 
-    length -= strlenpt(keystroke) + 1;
+    /* If the remaning space is too small, skip the description. */
+    width -= strlenpt(keystroke);
+    if (width < 2)
+	return;
 
-    if (length > 0) {
-	waddch(bottomwin, ' ');
-	wattron(bottomwin, interface_color_pair[FUNCTION_TAG]);
-	waddnstr(bottomwin, desc, actual_x(desc, length));
-	wattroff(bottomwin, interface_color_pair[FUNCTION_TAG]);
-    }
+    waddch(bottomwin, ' ');
+    wattron(bottomwin, interface_color_pair[FUNCTION_TAG]);
+    waddnstr(bottomwin, tag, actual_x(tag, width - 1));
+    wattroff(bottomwin, interface_color_pair[FUNCTION_TAG]);
 }
 
 /* Redetermine current_y from the position of current relative to edittop,