Add command to shrink lines with dashes

Guides/ics-vim.md

@@ -15,3 +15,18 @@ After :
 ```
 SUMMARY:TP - CCUBE - C000
 ```
+
+## Shrink dash
+
+Command vim : `:%s/ - /,/g`
+
+Before :
+```
+SUMMARY:TP - CCUBE - C000
+```
+
+After :
+```
+SUMMARY:TP,CCUBE,C000
+```
+