patch 8.1.1934: not enough tests for text property popup window

Problem:    Not enough tests for text property popup window.
Solution:   Add a few more tests.

src/popupwin.c

@@ -1103,7 +1103,7 @@ popup_adjust_position(win_T *wp)
 	    wantcol = screen_ecol + wantcol;
 	else
 	    // left of the text
-	    wantcol = screen_scol + wantcol - 1;
+	    wantcol = screen_scol + wantcol - 2;
     }
 
     if (wp->w_popup_pos == POPPOS_CENTER)

src/testdir/dumps/Test_popup_textprop_corn_1.dump

@@ -0,0 +1,12 @@
+|4+0&#ffffff0|5| @72
+|4|6| @72
+|4|7| @3|╔+0#0000001#ffd7ff255|═@13|╗| +0#0000000#ffffff0@52
+|4|8| @3|║+0#0000001#ffd7ff255| |b|o|t@1|o|m| |r|i|g|h|t| |║| +0#0000000#ffffff0@52
+|4|9| @3|╚+0#0000001#ffd7ff255|═@13|╝| +0#0000000#ffffff0@5| +0#0000001#ffd7ff255|b|o|t@1|o|m| |l|e|f|t| | +0#0000000#ffffff0@33
+>n|o|w| |w|o|r|k|i|n|g| |w|i|t|h| |s|o|m|e| |l+0&#5fd7ff255|o|n|g|e|r| +0&#ffffff0|t|e|x|t| |h|e|r|e| @36
+|5|1| @8| +0#0000001#ffd7ff255|t|o|p| |r|i|g|h|t| | +0#0000000#ffffff0@5|╔+0#0000001#ffd7ff255|═@9|╗| +0#0000000#ffffff0@34
+|5|2| @25|║+0#0000001#ffd7ff255| |t|o|p| |l|e|f|t| |║| +0#0000000#ffffff0@34
+|5|3| @25|╚+0#0000001#ffd7ff255|═@9|╝| +0#0000000#ffffff0@34
+|5|4| @72
+|5@1| @72
+@57|5|0|,|1| @9|4|9|%| 

src/testdir/dumps/Test_popup_textprop_corn_2.dump

@@ -0,0 +1,12 @@
+|4+0&#ffffff0|5| @72
+|4|6| @72
+|4|7|╔+0#0000001#ffd7ff255|═@13|╗| +0#0000000#ffffff0@56
+|4|8|║+0#0000001#ffd7ff255| |b|o|t@1|o|m| |r|i|g|h|t| |║| +0#0000000#ffffff0@56
+|4|9|╚+0#0000001#ffd7ff255|═@13|╝| +0#0000000#ffffff0@5| +0#0000001#ffd7ff255|b|o|t@1|o|m| |l|e|f|t| | +0#0000000#ffffff0@37
+>w|o|r|k|i|n|g| |w|i|t|h| |s|o|m|e| |l+0&#5fd7ff255|o|n|g|e|r| +0&#ffffff0|t|e|x|t| |h|e|r|e| @40
+|5|1| @4| +0#0000001#ffd7ff255|t|o|p| |r|i|g|h|t| | +0#0000000#ffffff0@5|╔+0#0000001#ffd7ff255|═@9|╗| +0#0000000#ffffff0@38
+|5|2| @21|║+0#0000001#ffd7ff255| |t|o|p| |l|e|f|t| |║| +0#0000000#ffffff0@38
+|5|3| @21|╚+0#0000001#ffd7ff255|═@9|╝| +0#0000000#ffffff0@38
+|5|4| @72
+|5@1| @72
+@57|5|0|,|1| @9|4|9|%| 

src/testdir/dumps/Test_popup_textprop_corn_3.dump

@@ -0,0 +1,12 @@
+|4+0&#ffffff0|5| @72
+|4|6| @72
+|e|x|t|r>a| @69
+|4|7|╔+0#0000001#ffd7ff255|═@13|╗| +0#0000000#ffffff0@56
+|4|8|║+0#0000001#ffd7ff255| |b|o|t@1|o|m| |r|i|g|h|t| |║| +0#0000000#ffffff0@56
+|4|9|╚+0#0000001#ffd7ff255|═@13|╝| +0#0000000#ffffff0@5| +0#0000001#ffd7ff255|b|o|t@1|o|m| |l|e|f|t| | +0#0000000#ffffff0@37
+|w|o|r|k|i|n|g| |w|i|t|h| |s|o|m|e| |l+0&#5fd7ff255|o|n|g|e|r| +0&#ffffff0|t|e|x|t| |h|e|r|e| @40
+|5|1| @4| +0#0000001#ffd7ff255|t|o|p| |r|i|g|h|t| | +0#0000000#ffffff0@5|╔+0#0000001#ffd7ff255|═@9|╗| +0#0000000#ffffff0@38
+|5|2| @21|║+0#0000001#ffd7ff255| |t|o|p| |l|e|f|t| |║| +0#0000000#ffffff0@38
+|5|3| @21|╚+0#0000001#ffd7ff255|═@9|╝| +0#0000000#ffffff0@38
+|5|4| @72
+@57|4|7|,|5| @9|4|8|%| 

src/testdir/dumps/Test_popup_textprop_corn_4.dump

@@ -0,0 +1,12 @@
+|4+0&#ffffff0|5| @72
+>4|6| @72
+|4|7|╔+0#0000001#ffd7ff255|═@13|╗| +0#0000000#ffffff0@56
+|4|8|║+0#0000001#ffd7ff255| |b|o|t@1|o|m| |r|i|g|h|t| |║| +0#0000000#ffffff0@56
+|4|9|╚+0#0000001#ffd7ff255|═@13|╝| +0#0000000#ffffff0@5| +0#0000001#ffd7ff255|b|o|t@1|o|m| |l|e|f|t| | +0#0000000#ffffff0@37
+|w|o|r|k|i|n|g| |w|i|t|h| |s|o|m|e| |l+0&#5fd7ff255|o|n|g|e|r| +0&#ffffff0|t|e|x|t| |h|e|r|e| @40
+|5|1| @4| +0#0000001#ffd7ff255|t|o|p| |r|i|g|h|t| | +0#0000000#ffffff0@5|╔+0#0000001#ffd7ff255|═@9|╗| +0#0000000#ffffff0@38
+|5|2| @21|║+0#0000001#ffd7ff255| |t|o|p| |l|e|f|t| |║| +0#0000000#ffffff0@38
+|5|3| @21|╚+0#0000001#ffd7ff255|═@9|╝| +0#0000000#ffffff0@38
+|5|4| @72
+|5@1| @72
+|1| |l|i|n|e| |l|e|s@1|;| |b|e|f|o|r|e| |#|3| @1|1| |s|e|c|o|n|d| |a|g|o| @20|4|6|,|1| @9|4|9|%| 

src/testdir/test_popupwin_textprop.vim

@@ -50,5 +50,58 @@ func Test_textprop_popup()
   call delete('XtestTextpropPopup')
 endfunc
 
+func Test_textprop_popup_corners()
+  let lines =<< trim END
+	call setline(1, range(1, 100))
+	call setline(50, 'now working with some longer text here')
+	50
+	normal zz
+	set scrolloff=0
+	call prop_type_add('popupMarker', #{highlight: 'DiffAdd'})
+	call prop_add(50, 23, #{
+		\ length: 6,
+		\ type: 'popupMarker',
+		\ })
+	let winid = popup_create('bottom left', #{
+	      \ pos: 'botleft', 
+	      \ textprop: 'popupMarker',
+	      \ padding: [0,1,0,1],
+	      \ })
+	let winid = popup_create('bottom right', #{
+	      \ pos: 'botright', 
+	      \ textprop: 'popupMarker',
+	      \ border: [],
+	      \ padding: [0,1,0,1],
+	      \ })
+	let winid = popup_create('top left', #{
+	      \ pos: 'topleft', 
+	      \ textprop: 'popupMarker',
+	      \ border: [],
+	      \ padding: [0,1,0,1],
+	      \ })
+	let winid = popup_create('top right', #{
+	      \ pos: 'topright', 
+	      \ textprop: 'popupMarker',
+	      \ padding: [0,1,0,1],
+	      \ })
+  END
+  call writefile(lines, 'XtestTextpropPopupCorners')
+  let buf = RunVimInTerminal('-S XtestTextpropPopupCorners', #{rows: 12})
+  call VerifyScreenDump(buf, 'Test_popup_textprop_corn_1', {})
+
+  call term_sendkeys(buf, "0dw")
+  call VerifyScreenDump(buf, 'Test_popup_textprop_corn_2', {})
+
+  call term_sendkeys(buf, "46Goextra\<Esc>")
+  call VerifyScreenDump(buf, 'Test_popup_textprop_corn_3', {})
+
+  call term_sendkeys(buf, "u")
+  call VerifyScreenDump(buf, 'Test_popup_textprop_corn_4', {})
+
+  " clean up
+  call StopVimInTerminal(buf)
+  call delete('XtestTextpropPopupCorners')
+endfunc
+
 
 " vim: shiftwidth=2 sts=2

src/version.c

@@ -761,6 +761,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1934,
 /**/
     1933,
 /**/