document getindex() with range of length 1. (#41140)

jonasjonker · web-flow · commit de1444c02be3 · 2021-06-09T10:01:29.000-04:00
Added an example with A[:, 3:3] which returns a Matrix instead of a Vector. Somebody made me aware of this behavior on [stackoverflow](https://stackoverflow.com/questions/67889148/let-indexing-return-a-matrix-instead-of-a-vector-in-julia). but I couldn't find an example of it in the documentation.
diff --git a/doc/src/manual/arrays.md b/doc/src/manual/arrays.md
@@ -695,6 +695,12 @@ julia> A[:, 3]
  13
  15
  17
+
+julia> A[:, 3:3]
+3×1 Matrix{Int64}:
+ 13
+ 15
+ 17
 ```
 
 ### Cartesian indices

Original file line number	Diff line number	Diff line change
`@@ -695,6 +695,12 @@ julia> A[:, 3]`
`695`	`695`	`13`
`696`	`696`	`15`
`697`	`697`	`17`
	`698`	`+`
	`699`	`+julia> A[:, 3:3]`
	`700`	`+3×1 Matrix{Int64}:`
	`701`	`+ 13`
	`702`	`+ 15`
	`703`	`+ 17`
`698`	`704`	```
`699`	`705`
`700`	`706`	`### Cartesian indices`