Update doc/specs/stdlib_linalg.md

Co-authored-by: Jeremie Vandenplas <jeremie.vandenplas@gmail.com>

Author: perazz

doc/specs/stdlib_linalg.md

@@ -927,7 +927,7 @@ or reduced matrices: \( A = Q_1 R_1 \) (provide `shape(Q)==[m,k]`, `shape(R)==[k
 
 `q`: Shall be a rank-2 array of the same kind as `a`, containing the orthonormal matrix `q`. It is an `intent(out)` argument. It should have a shape equal to either `[m,m]` or `[m,k]`, whether the full or the reduced problem is sought for.
 
-`r`: Shall be a rank-2 array of the same kind as `a`, containing the upper triangular matrix `r`. It is an `intent(out)` argument. It should have shape either `[m,n]` or `[k,n]` whether the full or the reduced problem is sought for.
+`r`: Shall be a rank-2 array of the same kind as `a`, containing the upper triangular matrix `r`. It is an `intent(out)` argument. It should have a shape equal to either `[m,n]` or `[k,n]`, whether the full or the reduced problem is sought for.
 
 `storage` (optional): Shall be a rank-1 array of the same type and kind as `a`, providing working storage for the solver. It minimum size can be determined with a call to [[stdlib_linalg(module):qr_space(interface)]]. It is an `intent(inout)` argument.