Display a tilde before every capital letter for Canute

internal/display/bufwindow.go

@@ -2,6 +2,7 @@ package display
 
 import (
 	"strconv"
+	"unicode"
 
 	runewidth "github.com/mattn/go-runewidth"
 	"github.com/zyedidia/micro/v2/internal/buffer"
@@ -624,9 +625,13 @@ func (w *BufWindow) displayBuffer() {
 				width = util.Min(ts, maxWidth-vloc.X)
 				totalwidth += ts
 			default:
+				if unicode.IsUpper(r) {
+					width = 2
+				} else {
 					width = runewidth.RuneWidth(r)
 					totalwidth += width
 				}
+			}
 
 			word = append(word, glyph{r, combc, curStyle, width})
 			wordwidth += width
@@ -658,6 +663,10 @@ func (w *BufWindow) displayBuffer() {
 			}
 
 			for _, r := range word {
+				if unicode.IsUpper(r.r) {
+					draw('~', nil, r.style, true, true)
+					draw(r.r, r.combc, r.style, true, false)
+				} else {
 					draw(r.r, r.combc, r.style, true, true)
 
 					// Draw any extra characters either spaces for tabs or @ for incomplete wide runes
@@ -671,6 +680,7 @@ func (w *BufWindow) displayBuffer() {
 							draw(char, nil, r.style, true, false)
 						}
 					}
+				}
 				bloc.X++
 			}