patch 8.0.1809: various typos

Problem:    Various typos.
Solution:   Correct the mistakes, change "cursur" to "cursor". (closes #2887)
diff --git a/src/edit.c b/src/edit.c
index 9b72064..ef4c98d 100644
--- a/src/edit.c
+++ b/src/edit.c
@@ -431,7 +431,7 @@
 #ifdef FEAT_CONCEAL
     /* Check if the cursor line needs redrawing before changing State.  If
      * 'concealcursor' is "n" it needs to be redrawn without concealing. */
-    conceal_check_cursur_line();
+    conceal_check_cursor_line();
 #endif
 
 #ifdef FEAT_MOUSE
diff --git a/src/normal.c b/src/normal.c
index be0e75e..3b958a5 100644
--- a/src/normal.c
+++ b/src/normal.c
@@ -7797,7 +7797,7 @@
 {
 #ifdef FEAT_CONCEAL
     /* Check for redraw before changing the state. */
-    conceal_check_cursur_line();
+    conceal_check_cursor_line();
 #endif
 
     VIsual_mode = c;
@@ -7824,7 +7824,7 @@
 #endif
 #ifdef FEAT_CONCEAL
     /* Check for redraw after changing the state. */
-    conceal_check_cursur_line();
+    conceal_check_cursor_line();
 #endif
 
     if (p_smd && msg_silent == 0)
diff --git a/src/proto/screen.pro b/src/proto/screen.pro
index f04fda5..f690f93 100644
--- a/src/proto/screen.pro
+++ b/src/proto/screen.pro
@@ -12,7 +12,7 @@
 void update_curbuf(int type);
 int update_screen(int type_arg);
 int conceal_cursor_line(win_T *wp);
-void conceal_check_cursur_line(void);
+void conceal_check_cursor_line(void);
 void update_single_line(win_T *wp, linenr_T lnum);
 void update_debug_sign(buf_T *buf, linenr_T lnum);
 void updateWindow(win_T *wp);
diff --git a/src/screen.c b/src/screen.c
index cff6ae5..cac5a3a 100644
--- a/src/screen.c
+++ b/src/screen.c
@@ -906,7 +906,7 @@
  * Check if the cursor line needs to be redrawn because of 'concealcursor'.
  */
     void
-conceal_check_cursur_line(void)
+conceal_check_cursor_line(void)
 {
     if (curwin->w_p_cole > 0 && conceal_cursor_line(curwin))
     {
diff --git a/src/ui.c b/src/ui.c
index bb03880..05e82e6 100644
--- a/src/ui.c
+++ b/src/ui.c
@@ -1971,7 +1971,7 @@
 # endif
 
 # ifdef FEAT_CONCEAL
-    conceal_check_cursur_line();
+    conceal_check_cursor_line();
 # endif
 }
 
diff --git a/src/version.c b/src/version.c
index db47bea..b71b384 100644
--- a/src/version.c
+++ b/src/version.c
@@ -762,6 +762,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1809,
+/**/
     1808,
 /**/
     1807,